DOCUMENT INFORMATION	12 Months Ended
DOCUMENT INFORMATION	Oct. 31, 2019
Document Information [Line Items]
Amendment Flag	false
Document Type	10-K
Document Annual Report	true
Document Period End Date	Oct. 31, 2019
Document Fiscal Period Focus	FY
Document Transition Report	false
Document Fiscal Year Focus	2019

DOCUMENT AND ENTITY INFORMATION ENTITY INFORMATION - USD ($)	12 Months Ended
	Oct. 31, 2019	Apr. 30, 2019
Entity Information [Line Items]
Entity Central Index Key	0000046619
Current Fiscal Year End Date	--10-31
Entity File Number	001-04604
Entity Registrant Name	HEICO CORPORATION
Entity Incorporation, State or Country Code	FL
Entity Tax Identification Number	65-0341002
Entity Address, Address Line One	3000 Taft Street
Entity Address, City or Town	Hollywood
Entity Address, State or Province	FL
Entity Address, Postal Zip Code	33021
City Area Code	954
Local Phone Number	987-4000
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Public Float		$ 11,866,123,000

DOCUMENT AND ENTITY INFORMATION ENTITY LISTING INFORMATION - $ / shares	12 Months Ended
	Oct. 31, 2019	Dec. 17, 2019
Heico Common Stock [Member]
Entity Listings [Line Items]
Title of 12(b) Security	Common Stock, $.01 par value per share
Trading Symbol	HEI
Security Exchange Name	NYSE
Entity Listing, Par Value Per Share	$ 0.01
Entity Common Stock, Shares Outstanding		54,142,746
Common Class A [Member]
Entity Listings [Line Items]
Title of 12(b) Security	Class A Common Stock, $.01 par value per share
Trading Symbol	HEI.A
Security Exchange Name	NYSE
Entity Listing, Par Value Per Share	$ 0.01
Entity Common Stock, Shares Outstanding		80,359,982

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Oct. 31, 2019	Oct. 31, 2018
Current assets:
Cash and cash equivalents	$ 57,001	$ 59,599
Accounts receivable, net	274,326	237,286
Contract assets	43,132	14,183
Inventories, net	420,319	401,553
Prepaid expenses and other current assets	18,953	21,187
Total current assets	813,731	733,808
Property, plant and equipment, net	173,345	154,739
Goodwill	1,268,703	1,114,832
Intangible assets, net	550,693	506,360
Other assets	162,739	143,657
Total assets	2,969,211	2,653,396
Current liabilities:
Current maturities of long-term debt	906	859
Trade accounts payable	106,225	107,219
Accrued expenses and other current liabilities	178,957	171,514
Income taxes payable	3,050	2,837
Total current liabilities	289,138	282,429
Long-term debt, net of current maturities	561,049	531,611
Deferred income taxes	51,496	46,644
Other long-term liabilities	184,604	157,658
Total liabilities	1,086,287	1,018,342
Commitments and contingencies
Redeemable noncontrolling interests	188,264	132,046
Shareholders' equity:
Preferred Stock	0	0
Common Stock	541	534
Capital in excess of par value	284,609	320,994
Deferred compensation obligation	4,232	3,928
HEICO stock held by irrevocable trust	(4,232)	(3,928)
Accumulated other comprehensive (loss) income	(16,739)	(15,256)
Retained earnings	1,397,327	1,091,183
Total HEICO shareholders' equity	1,666,542	1,398,251
Noncontrolling interests	28,118	104,757
Total shareholders' equity	1,694,660	1,503,008
Total liabilities and equity	2,969,211	2,653,396
Common Class A [Member]
Shareholders' equity:
Common Stock	$ 804	$ 796

CONSOLIDATED BALANCE SHEETS [PARENTHETICAL] - $ / shares shares in Thousands	Oct. 31, 2019	Oct. 31, 2018
Preferred Stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred Stock, shares authorized	10,000	10,000
Preferred Stock, shares issued	0	0
Common stock, par value (in dollar per share)	$ 0.01	$ 0.01
Common stock, shares authorized	150,000	150,000
Common stock, shares issued	54,143	53,355
Common stock, shares outstanding	54,143	53,355
Common Class A [Member]
Common stock, par value (in dollar per share)	$ 0.01	$ 0.01
Common stock, shares authorized	150,000	150,000
Common stock, shares issued	80,353	79,576
Common stock, shares outstanding	80,353	79,576

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Net sales	$ 2,055,647	$ 1,777,721	$ 1,524,813
Operating costs and expenses:
Cost of sales	1,241,807	1,087,006	950,088
Selling, general and administrative expenses	356,743	314,470	268,067
Total operating costs and expenses	1,598,550	1,401,476	1,218,155
Operating income	457,097	376,245	306,658
Interest expense	(21,695)	(19,901)	(9,790)
Other income	2,439	(58)	1,092
Income before taxes and noncontrolling interests	437,841	356,286	297,960
Income tax expense	78,100	70,600	90,300
Net income from consolidated operations	359,741	285,686	207,660
Less: Net income attributable to noncontrolling interests	31,845	26,453	21,675
Net income attributable to HEICO	$ 327,896	$ 259,233	$ 185,985
Net income per share attributable to HEICO shareholders:
Basic (in dollars per share)	$ 2.45	$ 1.96	$ 1.41
Diluted (in dollars per share)	$ 2.39	$ 1.90	$ 1.37
Weighted average number of common shares outstanding:
Basic (in shares)	133,640	132,543	131,703
Diluted (in shares)	137,350	136,696	135,588

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Net income from consolidated operations	$ 359,741	$ 285,686	$ 207,660
Other comprehensive (loss) income:
Foreign currency translation adjustments	(844)	(5,243)	15,346
Unrealized (loss) gain on defined benefit pension plan, net of tax	(889)	(97)	321
Amortization of unrealized loss on defined benefit pension plan, net of tax	25	13	29
Total other comprehensive (loss) income	(1,708)	(5,327)	15,696
Comprehensive income from consolidated operations	358,033	280,359	223,356
Less: Net income attributable to noncontrolling interests	31,845	26,453	21,675
Less: Foreign currency translation adjustments attributable to noncontrolling interests	(225)	(406)	926
Comprehensive income attributable to noncontrolling interests	31,620	26,047	22,601
Comprehensive income attributable to HEICO	$ 326,413	$ 254,312	$ 200,755

CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Redeemable Noncontrolling Interests [Member]	Common Stock [Member]	Common Stock [Member] Common Class A [Member]	Capital in Excess of Par Value [Member]	Deferred Compensation Obligation [Member]	HEICO Stock Held By Irrevocable Trust [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Noncontrolling Interest [Member]	Total Shareholders Equity [Member]
Balances at Oct. 31, 2016	$ 1,047,705		$ 270	$ 403	$ 306,328	$ 2,460	$ (2,460)	$ (25,326)	$ 681,704	$ 84,326
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	200,755							14,770	185,985
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest	22,601	$ 11,637								10,964
Comprehensive Income (Loss)	223,356										$ 211,719
Cash dividends	(12,807)								(12,807)
Stock Issued During Period, Value, Stock Dividend			68	101
Adjustments to Additional Paid in Capital, Stock Split					(169)
Dividends, Common Stock, Stock	(23)								(23)
Issuance of Common Stock to HEICO SIP	7,517				7,517
Share-based Compensation Expense	7,415				7,415
Proceeds from stock option exercises	5,659			3	5,656
Noncontrolling interests assumed related to acquisition		(23,339)
Distributions to noncontrolling interests		(10,323)								(8,078)	(8,078)
Acquisitions of noncontrolling interests	194	(3,848)							194
Adjustments to redemption amount of redeemable noncontrolling interests		10,806							(10,806)		(10,806)
Deferred Compensation Obligation							658
Stock Held During Period Value Deferred Compensation Obligation						(658)
Adjustments to Additional Paid in Capital, Other					(203)
Stockholders' Equity, Other											(203)
Balances at Oct. 31, 2017	1,248,292		338	507	326,544	3,118	(3,118)	(10,556)	844,247	87,212
Redeemable noncontrolling interests at Oct. 31, 2016	99,512
Increase (Decrease) in Temporary Equity [Roll Forward]
Comprehensive Income (Loss), Net of Tax, Attributable to Redeemable Noncontrolling Interest	22,601	11,637								10,964
Noncontrolling interests assumed related to acquisition		23,339
Distributions to noncontrolling interests		(10,323)								(8,078)	(8,078)
Acquisitions of noncontrolling interests	(194)	3,848							(194)
Adjustments to redemption amount of redeemable noncontrolling interests		10,806							(10,806)		(10,806)
Redeemable noncontrolling interests at Oct. 31, 2017	131,123
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	254,312							(4,921)	259,233
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest	26,047	13,070								12,977
Comprehensive Income (Loss)	280,359										267,289
Cash dividends	(15,363)								(15,363)
Stock Issued During Period, Value, Stock Dividend			191	286
Adjustments to Additional Paid in Capital, Stock Split					(477)
Dividends, Common Stock, Stock	(28)								(28)
Issuance of Common Stock to HEICO SIP	7,870		1	1	7,868
Share-based Compensation Expense	9,283				9,283
Proceeds from stock option exercises	4,031		7	2	4,022
Redemption of common stock related to stock option exercises			(3)		(24,980)						(24,983)
Noncontrolling interests assumed related to acquisition		(2,491)								(5,350)	(5,350)
Distributions to noncontrolling interests		(12,005)								(1,054)	(1,054)
Adjustments to redemption amount of redeemable noncontrolling interests		(3,627)							3,627		3,627
Deferred Compensation Obligation							810
Stock Held During Period Value Deferred Compensation Obligation						(810)
Adjustments to Additional Paid in Capital, Other					(1,266)
Stockholders' Equity, Other								221	(533)	272	(1,306)
Balances at Oct. 31, 2018	1,503,008		534	796	320,994	3,928	(3,928)	(15,256)	1,091,183	104,757
Increase (Decrease) in Temporary Equity [Roll Forward]
Comprehensive Income (Loss), Net of Tax, Attributable to Redeemable Noncontrolling Interest	26,047	13,070								12,977
Noncontrolling interests assumed related to acquisition		2,491								5,350	5,350
Distributions to noncontrolling interests		(12,005)								(1,054)	(1,054)
Adjustments to redemption amount of redeemable noncontrolling interests		(3,627)							3,627		3,627
Temporary Equity, Other		994
Redeemable noncontrolling interests at Oct. 31, 2018	132,046
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	326,413							(1,483)	327,896
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest	31,620	18,116								13,504
Comprehensive Income (Loss)	358,033										339,917
Cash dividends	(18,691)								(18,691)
Issuance of Common Stock to HEICO SIP	8,666				8,666
Share-based Compensation Expense	10,334				10,334
Proceeds from stock option exercises	8,547		12	8	8,527
Redemption of common stock related to stock option exercises	(64,014)		(5)	(1)	(64,008)
Noncontrolling interests assumed related to acquisition		(38,696)								(2,551)	(2,551)
Distributions to noncontrolling interests		(17,847)								(93,022)	(93,022)
Adjustments to redemption amount of redeemable noncontrolling interests		16,434							(16,434)		(16,434)
Deferred Compensation Obligation							304
Stock Held During Period Value Deferred Compensation Obligation						(304)
Adjustments to Additional Paid in Capital, Other					96
Stockholders' Equity, Other				1						2	99
Balances at Oct. 31, 2019	1,694,660		$ 541	$ 804	$ 284,609	$ 4,232	$ (4,232)	$ (16,739)	1,397,327	28,118
Increase (Decrease) in Temporary Equity [Roll Forward]
Comprehensive Income (Loss), Net of Tax, Attributable to Redeemable Noncontrolling Interest	31,620	18,116								13,504
Noncontrolling interests assumed related to acquisition		38,696								2,551	2,551
Distributions to noncontrolling interests		(17,847)								(93,022)	(93,022)
Adjustments to redemption amount of redeemable noncontrolling interests		16,434							(16,434)		(16,434)
Redeemable noncontrolling interests at Oct. 31, 2019	$ 188,264
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative Effect of New Accounting Principle in Period of Adoption \| Accounting Standards Update 2014-09 [Member]		$ 819							$ 13,373	$ 326	$ 13,699

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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY [PARENTHETICAL] - $ / shares	12 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Cash dividends per share (in dollars per share)	$ 0.140	$ 0.116	$ 0.097

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Operating Activities:
Net income from consolidated operations	$ 359,741	$ 285,686	$ 207,660
Adjustments to reconcile net income from consolidated operations to net cash provided by operating activities:
Depreciation and amortization	83,497	77,191	64,823
Share-based compensation expense	10,334	9,283	7,415
Employer contributions to HEICO Savings and Investment Plan	9,528	8,019	7,768
Increase in accrued contingent consideration	2,630		1,100
Decrease in accrued contingent consideration		1,365
Deferred income tax benefit	(6,392)	(12,977)	(11,096)
Payment of contingent consideration	(3,105)
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable	(28,976)	(23,763)	7,384
Contract assets	11,583	(4,806)	(4,538)
Inventories	(30,077)	(49,455)	(21,204)
Prepaid expenses and other current assets	609	401	134
Trade accounts payable	(3,851)	17,403	6,386
Accrued expenses and other current liabilities	17,151	22,121	1,794
Income taxes payable	1,296	(12,530)	6,071
Change in long-term liabilities and assets related to HEICO LCP	12,920	11,610	12,841
Other	490	1,669	1,747
Net cash provided by operating activities	437,378	328,487	288,285
Investing Activities:
Acquisitions, net of cash acquired	(240,841)	(59,775)	(418,265)
Capital expenditures	(28,938)	(41,871)	(25,998)
Net Investment Related to HEICO LCP	(13,701)	(11,500)	(13,400)
Other	2,834	(365)	(552)
Net cash used in investing activities	(280,646)	(113,511)	(458,215)
Financing Activities:
Borrowings on revolving credit facility	313,000	56,000	404,000
Payments on revolving credit facility	(283,000)	(204,000)	(190,877)
Distributions to noncontrolling interests	(110,869)	(13,059)	(18,401)
Redemption of common stock related to stop option exercises	(64,014)	(24,983)	(203)
Cash dividends paid	(18,691)	(15,363)	(12,807)
Payment of contingent consideration	(4,073)	(5,425)	(7,039)
Revolving credit facility issuance costs		(4,067)	(270)
Acquisitions of noncontrolling interests			(3,848)
Proceeds from stock option exercises	8,547	4,031	5,659
Other	(620)	(669)	(342)
Net cash (used in) provided by financing activities	(159,720)	(207,535)	175,872
Effect of exchange rate changes on cash	390	92	3,169
Net increase (decrease) in cash and cash equivalents	(2,598)	7,533	9,111
Cash and cash equivalents at beginning of year	59,599	52,066	42,955
Cash and cash equivalents at end of year	$ 57,001	$ 59,599	$ 52,066

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

12 Months Ended

Oct. 31, 2019

Accounting Policies [Abstract]

Significant Accounting Policies [Text Block]

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Nature of Business

HEICO Corporation, through its principal subsidiaries consisting of HEICO Aerospace Holdings Corp. (“HEICO Aerospace”), HEICO Flight Support Corp. and HEICO Electronic Technologies Corp. (“HEICO Electronic”) and their respective subsidiaries (collectively, the “Company”), is principally engaged in the design, manufacture and sale of aerospace, defense and electronic related products and services throughout the United States ("U.S.") and internationally. The Company’s customer base is primarily the aviation, defense, space, medical, telecommunications and electronics industries.

Basis of Presentation

The Company has two operating segments: the Flight Support Group (“FSG”), consisting of HEICO Aerospace and HEICO Flight Support Corp. and their respective subsidiaries; and the Electronic Technologies Group (“ETG”), consisting of HEICO Electronic and its subsidiaries.

Certain prior year amounts have been reclassified to conform to the current year presentation principally to reflect the adoption of Accounting Standards Update ("ASU") 2014-09, "Revenue from Contracts with Customers," in the first quarter of fiscal 2019.

The consolidated financial statements include the financial accounts of HEICO Corporation and its direct subsidiaries, all of which are wholly owned except for HEICO Aerospace, which is 20% owned by Lufthansa Technik AG ("LHT"), the technical services subsidiary of Lufthansa German Airlines. HEICO Flight Support Corp. consolidates three subsidiaries which are 80%, 82.3% and 84%, owned, respectively, and six subsidiaries that are each 80.1% owned. In addition, HEICO Aerospace consolidates a joint venture, which is 84% owned. HEICO Electronic consolidates seven subsidiaries, which are 75.0%, 80.1%, 80.1%, 82.5%, 85.0%, 92.7% and 95.9% owned, respectively. Certain subsidiaries of HEICO Electronic consolidate subsidiaries that are less than wholly owned. See Note 12, Redeemable Noncontrolling Interests. All intercompany balances and transactions are eliminated.

Use of Estimates and Assumptions

The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates.

Cash and Cash Equivalents

For purposes of the consolidated financial statements, the Company considers all highly liquid investments such as U.S. Treasury bills and money market funds with an original maturity of three months or less at the time of purchase to be cash equivalents.

Accounts Receivable

Accounts receivable consist of amounts billed and currently due from customers. The valuation of accounts receivable requires that the Company set up an allowance for estimated uncollectible accounts and record a corresponding charge to bad debt expense. The Company estimates uncollectible receivables based on such factors as its prior experience, its appraisal of a customer’s ability to pay, age of receivables outstanding and economic conditions within and outside of the aviation, defense, space, medical, telecommunications and electronics industries.

Contract Assets

Contract assets (unbilled receivables) represent revenue recognized on contracts using an over-time recognition model in excess of amounts invoiced to the customer. See Note 6, Revenue, for additional information regarding the Company's contract assets.

Concentrations of Credit Risk

Financial instruments that potentially subject the Company to concentrations of credit risk consist principally of temporary cash investments and trade accounts receivable. The Company places its temporary cash investments with high credit quality financial institutions and limits the amount of credit exposure to any one financial institution. Concentrations of credit risk with respect to trade receivables are limited due to the large number of customers comprising the Company’s customer base and their dispersion across many different geographical regions. The Company performs ongoing credit evaluations of its customers, but does not generally require collateral to support customer receivables.

Inventory

Inventory is stated at the lower of cost or net realizable value, with cost being determined on the first-in, first-out or the average cost basis. Losses, if any, are recognized fully in the period when identified. The Company periodically evaluates the carrying value of inventory, giving consideration to factors such as its physical condition, sales patterns and expected future demand in order to estimate the amount necessary to write down any slow moving, obsolete or damaged inventory. These estimates could vary significantly from actual amounts based upon future economic conditions, customer inventory levels or competitive factors that were not foreseen or did not exist when the estimated write-downs were made. In accordance with industry practice, all inventories are classified as a current asset including portions with long production cycles, some of which may not be realized within one year.

Property, Plant and Equipment

Property, plant and equipment is recorded at cost. Depreciation and amortization is generally provided on the straight-line method over the estimated useful lives of the various assets. The Company’s property, plant and equipment is generally depreciated over the following estimated useful lives:

The costs of major additions and improvements are capitalized. Leasehold improvements are amortized over the shorter of the leasehold improvement’s useful life or the lease term.

Repairs and maintenance costs are expensed as incurred. Upon an asset's disposition, its cost and related accumulated depreciation are removed from the financial accounts and any resulting gain or loss is reflected within earnings.

Capital Leases

Assets acquired under capital leases are recorded at the lower of the asset's fair value or the present value of the future minimum lease payments, excluding any portion of the lease payments representing executory costs. The discount rate used in determining the present value of the minimum lease payments is the lower of the rate implicit in the lease or the Company's incremental borrowing rate. Assets under capital leases are included in property, plant and equipment and are depreciated over the shorter of the lease term or the useful life of the leased asset. Lease payments under capital leases are recognized as a reduction of the capital lease obligation and as interest expense.

Business Combinations

The Company allocates the purchase price of acquired entities to the underlying tangible and identifiable intangible assets acquired and liabilities and any noncontrolling interests assumed based on their estimated fair values, with any excess recorded as goodwill. The operating results of acquired businesses are included in the Company’s results of operations beginning as of their effective acquisition dates. Acquisition costs are generally expensed as incurred and totaled $3.2 million in fiscal 2019. Acquisition costs were not material in fiscal 2018 or 2017.

For contingent consideration arrangements, a liability is recognized at fair value as of the acquisition date with subsequent fair value adjustments recorded in operations. Additional information regarding the Company's contingent consideration arrangements may be found in Note 2, Acquisitions, and Note 8, Fair Value Measurements.

Goodwill and Other Intangible Assets

The Company tests goodwill for impairment annually as of October 31, or more frequently if events or changes in circumstances indicate that the carrying amount of goodwill may not be fully recoverable. In evaluating the recoverability of goodwill, the Company compares the fair value of each of its reporting units to its carrying value to determine potential impairment. If the carrying value of a reporting unit exceeds its fair value, the implied fair value of that reporting unit’s goodwill is to be calculated and an impairment loss is recognized in the amount by which the carrying value of the reporting unit’s goodwill exceeds its implied fair value, if any. The fair values of the Company's reporting units are determined by using a weighted average of a market approach and an income approach. Under the market approach, fair values are estimated using published market multiples for comparable companies. The Company calculates fair values under the income approach by taking estimated future cash flows that are based on internal projections and other assumptions deemed reasonable by management and discounting them using an estimated weighted average cost of capital.

The Company’s intangible assets not subject to amortization consist principally of its trade names. The Company’s intangible assets subject to amortization are amortized on the straight-line method (except for certain customer relationships amortized on an accelerated method) over the following estimated useful lives:



Customer relationships	4	to	15	years
Intellectual property	4	to	22	years
Licenses	10	to	11	years
Patents	5	to	20	years
Trade names	8	to	15	years

Amortization expense of intellectual property, licenses and patents is recorded as a component of cost of sales, and amortization expense of customer relationships, non-compete agreements and trade names is recorded as a component of selling, general and administrative ("SG&A") expenses in the Company’s Consolidated Statements of Operations. The Company tests each non-amortizing intangible asset for impairment annually as of October 31, or more frequently if events or changes in circumstances indicate that the asset might be impaired. To derive the fair value of its trade names, the Company utilizes an income approach, which relies upon management's assumptions of royalty rates, projected revenues and discount rates. The Company also tests each amortizing intangible asset for impairment if events or circumstances indicate that the asset might be impaired. The test consists of determining whether the carrying value of such assets will be recovered through undiscounted expected future cash flows. If the total of the undiscounted future cash flows is less than the carrying amount of those assets, the Company recognizes an impairment loss based on the excess of the carrying amount over the fair value of the assets. The determination of fair value requires management to make a number of estimates, assumptions and judgments of such factors as projected revenues and earnings and discount rates.

Customer Rebates and Credits

The Company records accrued customer rebates and credits as a component of accrued expenses and other current liabilities in its Consolidated Balance Sheets. These amounts generally relate to discounts negotiated with customers as part of certain sales contracts that are usually tied to sales volume thresholds. The Company accrues customer rebates and credits as a reduction within net sales as the revenue is recognized based on the estimated level of discount rate expected to be earned by each customer over the life of the contractual rebate period (generally one year). Accrued customer rebates and credits are monitored by management and discount levels are updated at least quarterly.

Product Warranties

Product warranty liabilities are estimated at the time of shipment and recorded as a component of accrued expenses and other current liabilities in the Company’s Consolidated Balance Sheets. The amount recognized is based on historical claims experience.

Defined Benefit Pension Plan

In connection with a prior year acquisition, the Company assumed a frozen qualified defined benefit pension plan (the "Plan"). The Plan's benefits are based on employee compensation and years of service; however, the accrued benefit for Plan participants was fixed as of the date of acquisition. The Company uses an actuarial valuation to determine the projected benefit obligation of the Plan and records the difference between the fair value of the Plan's assets and the projected benefit obligation as of October 31 in other long-term liabilities in its Consolidated Balance Sheets. Additionally, any actuarial gain or loss that arises during a fiscal year that is not recognized as a component of net periodic pension income or expense is recorded as a component of other comprehensive income or (loss), net of tax. The following table presents the fair value of the Plan's assets and projected benefit obligation as of October 31, for each of the last two fiscal years (in thousands):



	As of October 31,
	2019			2018
Fair value of plan assets		$11,311			$10,379
Projected benefit obligation	13,943			12,890
Funded status		($2,632	)		($2,511	)

Revenue Recognition

During fiscal 2019, the Company adopted ASU 2014-09, which, as amended, was codified as Accounting Standard Codification ("ASC") Topic 606, "Revenue from Contracts with Customers" ("ASC 606"). Pursuant to ASC 606, the Company recognizes revenue when it transfers control of a promised good or service to a customer in an amount that reflects the consideration it expects to receive in exchange for the good or service. The Company's performance obligations are satisfied and control is transferred either at a point-in-time or over-

time. The majority of the Company's revenue is recognized at a point-in-time when control is transferred, which is generally evidenced by the shipment or delivery of the product to the customer, a transfer of title, a transfer of the significant risks and rewards of ownership, and customer acceptance. For certain contracts under which the Company produces products with no alternative use and for which it has an enforceable right to recover costs incurred plus a reasonable profit margin for work completed to date and for certain other contracts under which the Company creates or enhances a customer-owned asset while performing repair and overhaul services, control is transferred to the customer over-time. The Company recognizes revenue using an over-time recognition model for these types of contracts. See Note 1, Summary of Significant Accounting Policies - New Accounting Pronouncements, and Note 6, Revenue, for additional information regarding the Company's revenue recognition policy.

Stock-Based Compensation

The Company records compensation expense associated with stock options in its Consolidated Statements of Operations based on the grant date fair value of those awards. The fair value of each stock option on the date of grant is estimated using the Black-Scholes pricing model based on certain valuation assumptions. Expected stock price volatility is based on the Company’s historical stock prices over the contractual term of the option grant and other factors. The risk-free interest rate used is based on the published U.S. Treasury yield curve in effect at the time of the option grant for instruments with a similar life. The dividend yield reflects the Company’s expected dividend yield at the date of grant. The expected option life represents the period of time that the stock options are expected to be outstanding, taking into consideration the contractual term of the option grant and employee historical exercise behavior. The Company generally recognizes stock option compensation expense ratably over the award’s vesting period.

Income Taxes

Income tax expense includes U.S. and foreign income taxes. Deferred income taxes are provided on elements of income that are recognized for financial reporting purposes in periods different from when recognized for income tax purposes. Deferred tax assets and liabilities are recognized for the tax effects of temporary differences between the financial reporting and income tax bases of assets and liabilities and are measured using enacted tax rates in effect for the year in which the differences are expected to reverse. Tax law and rate changes are reflected in income in the period such changes are enacted. The Company's policy is to recognize interest and penalties related to income tax matters as a component of income tax expense and to treat any tax on Global Intangible Low-Taxed Income ("GILTI") as a current period income tax expense. Further information regarding income taxes can be found in Note 7, Income Taxes.

Redeemable Noncontrolling Interests

As further detailed in Note 12, Redeemable Noncontrolling Interests, the holders of equity interests in certain of the Company’s subsidiaries have rights (“Put Rights”) that require the Company to provide cash consideration for their equity interests (the “Redemption Amount”) at fair value or at a formula that management intended to reasonably approximate fair value based solely on a multiple of future earnings over a measurement period. The Put Rights are embedded in the shares owned by the noncontrolling interest holders and are not freestanding.

The Company tracks the carrying cost of such redeemable noncontrolling interests at historical cost plus an allocation of subsidiary earnings based on ownership interest, less dividends paid to the noncontrolling interest holders. Redeemable noncontrolling interests are recorded outside of permanent equity at the higher of their carrying cost or management’s estimate of the Redemption Amount. The initial adjustment to record redeemable noncontrolling interests at the Redemption Amount results in a corresponding decrease to retained earnings. Subsequent adjustments to the Redemption Amount of redeemable noncontrolling interests may result in corresponding decreases or increases to retained earnings, provided any increases to retained earnings may only be recorded to the extent of decreases previously recorded. Adjustments to Redemption Amounts based on fair value will have no effect on net income per share attributable to HEICO shareholders whereas the portion of periodic adjustments to the carrying amount of redeemable noncontrolling interests based solely on a multiple of future earnings that reflect a redemption amount in excess of fair value will affect net income per share attributable to HEICO shareholders. Acquisitions of redeemable noncontrolling interests are treated as equity transactions.

Net Income per Share Attributable to HEICO Shareholders

Basic net income per share attributable to HEICO shareholders is computed by dividing net income attributable to HEICO by the weighted average number of common shares outstanding during the period. Diluted net income per share attributable to HEICO shareholders is computed by dividing net income attributable to HEICO by the weighted average number of common shares outstanding during the period plus potentially dilutive common shares arising from the assumed exercise of stock options, if dilutive. The dilutive impact of potentially dilutive common shares is determined by applying the treasury stock method.

Foreign Currency

All assets and liabilities of foreign subsidiaries that do not utilize the U.S. dollar as its functional currency are translated at period-end exchange rates, while revenue and expenses are translated using average exchange rates for the period. Unrealized translation gains or losses are reported as foreign currency translation adjustments through other comprehensive income or (loss) in shareholders’ equity. Transaction gains or losses related to monetary balances denominated in a currency other than the functional currency are recorded in the Company's Consolidated Statements of Operations.

Contingencies

Losses for contingencies such as product warranties, litigation and environmental matters are recognized in income when they are probable and can be reasonably estimated. Gain contingencies are not recognized in income until they have been realized.

New Accounting Pronouncements

In May 2014, the Financial Accounting Standards Board ("FASB") issued ASU 2014-09, which, as amended, was codified as ASC Topic 606, "Revenue from Contracts with Customers" ("ASC 606"). ASC 606 provides a comprehensive new revenue recognition model that supersedes nearly all existing revenue recognition guidance. Under ASC 606, an entity recognizes revenue when it transfers promised goods or services to a customer at an amount that reflects the consideration it expects to receive in exchange for those goods or services. The guidance also requires additional disclosures about the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts.

The Company adopted ASC 606 as of November 1, 2018 using the modified retrospective method and recognized the cumulative effect of initially applying ASC 606 to all uncompleted contracts on the date of adoption as an adjustment to the opening balance of retained earnings. The comparative information has not been restated and remains as previously reported in accordance with ASC Topic 605, "Revenue Recognition."

ASC 606 impacts the timing of revenue recognition for certain contracts under which the Company produces products with no alternative use and for which it has an enforceable right to recover costs incurred plus a reasonable profit margin for work completed to date. ASC 606 also impacts the timing of revenue recognition for certain other contracts under which the Company creates or enhances customer-owned assets while performing repair and overhaul services. For these two types of contracts, the Company now recognizes revenue using an over-time recognition model as opposed to generally recognizing revenue at the time of shipment under previous guidance. See Note 6, Revenue, for additional information regarding the Company's revenue recognition policy and disclosures required by ASC 606.

The following table presents the cumulative effect of adopting ASC 606 on the Company's Consolidated Balance Sheet as of November 1, 2018 (in thousands):



	As Reported		Impact of			As Adjusted
	Under ASC 605		ASC 606			Under ASC 606
	October 31, 2018		Adoption			November 1, 2018
Assets
Contract assets		$14,183		$40,089			$54,272
Inventories, net	401,553		(29,412		)	372,141
Prepaid expenses and other current assets	21,187		(489		)	20,698

Liabilities
Accrued expenses and other current liabilities		$171,514		($8,588	)		$162,926
Deferred income taxes	46,644		4,258			50,902

Redeemable noncontrolling interests		$132,046		$819			$132,865

Shareholders' equity
Retained earnings		$1,091,183		$13,373			$1,104,556
Noncontrolling interests	104,757		326			105,083

The following table presents the impact of adopting ASC 606 on the Company's Consolidated Balance Sheet as of October 31, 2019 (in thousands):



	As of October 31, 2019
	As Reported		Effect of			As Adjusted
	Under ASC 606		ASC 606			Under ASC 605
Assets
Contract assets		$43,132		($39,638	)		$3,494
Inventories, net	420,319		28,079			448,398
Prepaid expenses and other current assets	18,953		116			19,069

Liabilities
Accrued expenses and other current liabilities		$178,957		$6,144			$185,101
Deferred income taxes	51,496		(3,978		)	47,518

Redeemable noncontrolling interests		$188,264		$—			$188,264

Shareholders' equity
Retained earnings		$1,397,327		($13,261	)		$1,384,066
Noncontrolling interests	28,118		(348		)	27,770

The impact of adopting ASC 606 on the Company's Consolidated Statement of Operations was not material for fiscal 2019.

In February 2016, the FASB issued ASU 2016-02, “Leases,” which requires recognition of lease assets and lease liabilities on the balance sheet of lessees. ASU 2016-02 is effective for fiscal years and interim reporting periods within those years beginning after December 15, 2018, or in fiscal 2020 for HEICO. The Company will adopt ASU 2016-02, as amended, as of November 1, 2019 using a modified retrospective transition approach with the election to apply the guidance as of the adoption date instead of at the beginning of the earliest comparative period presented. The adoption of this guidance will result in an increase in the Company's assets and liabilities due to the recognition of right-of-use ("ROU") assets and corresponding lease liabilities for leases that are currently classified as operating leases.

Upon adoption, the Company will elect certain practical expedients provided by this guidance including the package of transitional practical expedients, which allows the Company to not reassess whether any expired or existing contracts are or contain leases, not reassess the lease classification for any expired or existing leases, and not reassess initial direct costs for any existing leases; the short-term lease practical expedient, which allows the Company to not record an ROU asset and lease liability for any lease with a term of twelve months or less, and the single component practical expedient, which will allow the Company to include both lease and

non-lease components associated with a lease as a single lease component, if certain criteria are met, when determining the value of the ROU asset and lease liability.

The adoption of this guidance is expected to result in the Company recording ROU assets and corresponding lease liabilities of approximately $60 million to $75 million in the Company's consolidated balance sheet. The Company does not expect the adoption of this guidance will have a material effect on its consolidated results of operations or cash flows.

In January 2017, the FASB issued ASU 2017-04, "Simplifying the Test for Goodwill Impairment," which is intended to simplify the current test for goodwill impairment by eliminating the second step in which the implied value of a reporting unit is calculated when the carrying value of the reporting unit exceeds its fair value. Under ASU 2017-04, goodwill impairment should be recognized for the amount by which a reporting unit’s carrying value exceeds its fair value, not to exceed the carrying amount of goodwill. ASU 2017-04 must be applied prospectively and is effective for any annual or interim goodwill impairment test in fiscal years beginning after December 15, 2019, or in fiscal 2021 for HEICO. Early adoption is permitted. The Company is currently evaluating the effect the adoption of this guidance will have on its consolidated results of operations, financial position and cash flows.

ACQUISITIONS

12 Months Ended

Oct. 31, 2019

Business Combinations [Abstract]

Business Combination Disclosure [Text Block]

ACQUISITIONS

AAT Acquisition

On September 15, 2017, the Company, through HEICO Electronic, acquired all of the outstanding stock of AeroAntenna Technology, Inc. ("AAT"). The purchase price of this acquisition was paid in cash using proceeds from the Company's revolving credit facility. AAT designs and produces high performance active antenna systems for commercial aircraft, precision guided munitions, other defense applications and commercial uses. The Company believes that this acquisition is consistent with HEICO’s practice of acquiring high quality niche designers and manufacturers who also focus on customer needs and will further enable the Company to broaden its product offerings, technologies and customer base.

The following table summarizes the total consideration for the acquisition of AAT (in thousands):



Cash paid		$317,500
Less: cash acquired	(868		)
Cash paid, net	316,632
Contingent consideration	13,797
Additional purchase consideration	544
Total consideration		$330,973

As noted in the table above, the total consideration includes an accrual of $13.8 million as of the acquisition date representing the estimated fair value of contingent consideration the Company may be obligated to pay should AAT meet certain earnings objectives during the first six years following the acquisition. See Note 8, Fair Value Measurements, for additional information regarding the Company's contingent consideration obligation.

The following table summarizes the allocation of the total consideration for the acquisition of AAT to the estimated fair values of the tangible and identifiable intangible assets acquired and liabilities assumed (in thousands):



Assets acquired:
Goodwill		$157,901
Customer relationships	100,000
Intellectual property	39,000
Trade name	20,000
Inventories	8,306
Accounts receivable	6,115
Property, plant and equipment	1,893
Other assets	208
Total assets acquired, excluding cash	333,423

Liabilities assumed:
Accounts payable	1,299
Accrued expenses	1,151
Total liabilities assumed	2,450
Net assets acquired, excluding cash		$330,973

The primary items that generated the goodwill recognized were the premiums paid by the Company for the future earnings potential of AAT and the value of its assembled workforce that do not qualify for separate recognition. The amortization period of the customer relationships, intellectual property and trade name acquired is 15 years, 15 years and indefinite, respectively. The operating results of AAT were included in the Company’s results of operations from the effective acquisition date. The Company's consolidated net sales and net income attributable to HEICO for the fiscal year ended October 31, 2017 includes $10.2 million and $2.5 million, respectively from the acquisition of AAT.

The following table presents unaudited pro forma financial information for fiscal 2017 as if the acquisition of AAT had occurred as of November 1, 2015 (in thousands, except per share data):



	Year ended
	October 31, 2017
Net sales		$1,582,653
Net income from consolidated operations		$220,419
Net income attributable to HEICO		$198,744
Net income per share attributable to HEICO shareholders:
Basic		$1.51
Diluted		$1.47

The pro forma financial information is presented for comparative purposes only and is not necessarily indicative of the results of operations that actually would have been achieved if the acquisition had taken place as of November 1, 2015. The unaudited pro forma financial information includes adjustments to historical amounts such as additional amortization expense related to intangible assets acquired, increased interest expense associated with borrowings to finance the acquisition and inventory purchase accounting adjustments charged to cost of sales as the inventory is sold.

Other Acquisitions

In September 2019, the Company, through a subsidiary of HEICO Electronic, acquired all of the outstanding stock of TTT-Cubed, Inc. ("TTT"). TTT is a designer and manufacturer of Radio Frequency (RF) Sources, Detectors, and Controllers for a certain wide range of aerospace and defense applications. The purchase price of this acquisition was paid in cash using cash provided by operating activities.

In July 2019, the Company, jointly through HEICO Electronic and one of its subsidiaries, acquired substantially all of the assets and business of a France-based company and transferred the assets to a newly created subsidiary, Bernier Connect SAS ("Bernier"). The acquisition is inclusive of Bernier's 70% equity interest in Moulages Plastiques Industriels de L'essonne SARL, a plastics manufacturer. Bernier is a designer and manufacturer of interconnect products used in demanding defense, aerospace and industrial applications, primarily for communications-related purposes. The purchase price of this acquisition was paid in cash using cash provided by operating activities.

In June 2019, the Company, through HEICO Electronic, acquired 75% of the membership interests of Research Electronics International, LLC ("REI"). REI is a designer and manufacturer of Technical Surveillance Countermeasures (TSCM) equipment to detect devices used for espionage and information theft. The remaining 25% interest continues to be owned by certain members of REI's management team (see Note 12, Redeemable Noncontrolling Interests, for additional information).

In February 2019, the Company, through a subsidiary of HEICO Flight Support Corp., acquired 80.1% of the membership interests of Decavo LLC ("Decavo"). Decavo designs and produces complex composite parts and assemblies incorporated into camera and related sensor assemblies and unmanned aerial vehicle ("UAV") airframes used in demanding defense and civilian applications. The remaining 19.9% interest continues to be owned by certain members of Decavo's management team (see Note 12, Redeemable Noncontrolling Interests, for additional information). The total consideration includes an accrual of $2.1 million as of the acquisition date representing the estimated fair value of contingent consideration the Company may be obligated to pay should Decavo meet a certain earnings objective during the second and third years following the acquisition. See Note 8, Fair Value Measurements, for additional information regarding the Company's contingent consideration obligation. The purchase price of this acquisition was paid in cash principally using cash provided by operating activities.

In February 2019, the Company, through HEICO Electronic, acquired 85% of the stock of Solid Sealing Technology, Inc. ("SST"). SST designs and manufactures high-reliability ceramic-to-metal feedthroughs and connectors for demanding environments within the defense, industrial, life science, medical, research, semiconductor, and other markets. The remaining 15% interest continues to be owned by certain members of SST's management team (see Note 12, Redeemable Noncontrolling Interests, for additional information).

In November 2018, the Company, through a subsidiary of HEICO Electronic, acquired an additional equity interest in Freebird Semiconductor Corporation ("Freebird"), which increased the Company's aggregate equity interest in Freebird to greater than 50%. Accordingly, the Company began consolidating the operating results of Freebird as of the acquisition date. Prior to this transaction, the Company accounted for its investment in Freebird under the equity method. Freebird is a fabless design and manufacturing company that offers advanced high-reliability wide-band gap power switching technology. The purchase price of this acquisition was paid in cash using cash provided by operating activities.

In November 2018, the Company, through HEICO Electronic, acquired 92.7% of the stock of Apex Microtechnology, Inc. ("Apex"). Apex designs and manufactures precision power analog monolithic, hybrid and open frame components for a certain wide range of aerospace, defense, industrial, measurement, medical and test applications. The remaining 7.3% interest continues to be owned by certain members of Apex's management team (see Note 12, Redeemable Noncontrolling Interests, for additional information).

In November 2018, the Company, through HEICO Electronic, acquired all of the stock of Specialty Silicone Products, Inc. ("SSP"). SSP designs and manufactures silicone material for a variety of demanding applications used in aerospace, defense, research, oil and gas, testing, pharmaceuticals and other markets.

In September 2018, the Company, through a subsidiary of HEICO Electronic, obtained control over 53.1% of the equity interests of SST Components, Inc. (“SST Components”). SST Components manufactures discrete semiconductor components, tests electronic components, and custom assembles a wide variety of prototype and off the shelf components into desired package styles for military, space and commercial uses. The purchase price of this acquisition was paid using cash provided by operating activities.

In August 2018, the Company, through a subsidiary of HEICO Flight Support Corp., acquired all of the business and assets of Optical Display Engineering ("ODE"). ODE is a Federal Aviation Administration ("FAA")-authorized Part 145 Repair Station focusing on the repair of LCD screens and display modules for aviation displays used in civilian and military aircraft. ODE also holds FAA-Parts Manufacturer Approval authority to supply products that it repairs. The purchase price of this acquisition was paid in cash, principally using cash provided by operating activities.

In April 2018, the Company, through a subsidiary of HEICO Electronic, acquired all of the assets and business of the Emergency Locator Transmitter Beacon product line ("ELT Product Line") of Instrumar Limited. The ELT Product Line designs and manufactures Emergency Locator Transmitter Beacons for the commercial aviation and defense markets that upon activation, transmit a distress signal to alert search and rescue operations of the aircraft's location. The purchase price of this acquisition was paid using cash provided by operating activities.

In February 2018, the Company, through a subsidiary of HEICO Electronic, acquired 85% of the assets and business of Sensor Technology Engineering, Inc. ("Sensor Technology"). Sensor Technology designs and manufactures sophisticated nuclear radiation detectors for law enforcement, homeland security and military applications. The remaining 15% continues to be owned by certain members of Sensor Technology's management team (see Note 12, Redeemable Noncontrolling Interests, for additional information).

In November 2017, the Company, through a subsidiary of HEICO Electronic, acquired all of the stock of Interface Displays & Controls, Inc. ("IDC"). IDC designs and manufactures electronic products for aviation, marine, military fighting vehicles, and embedded computing markets. The purchase price of this acquisition was paid using cash provided by operating activities.

In June 2017, the Company, through a subsidiary of HEICO Flight Support Corp., acquired all of the ownership interests of Carbon by Design ("CBD"). CBD is a manufacturer of composite components for UAVs, rockets, spacecraft and other specialized applications. The purchase price of CBD was paid using cash provided by operating activities.

In April 2017, the Company, through a subsidiary of HEICO Flight Support Corp., acquired 80.1% of the equity interests of LLP Enterprises, LLC, which owns all of the outstanding equity interests of the operating units of Air Cost Control ("A2C"). A2C is a leading aviation electrical interconnect product distributor of items such as connectors, wire, cable,

protection and fastening systems, in addition to distributing a wide range of electromechanical parts. The remaining 19.9% interest continues to be owned by the founders of A2C (see Note 12, Redeemable Noncontrolling Interests, for additional information).

Unless otherwise noted, the purchase price of each of the above referenced other acquisitions was paid in cash, principally using proceeds from the Company's revolving credit facility, and is not material or significant to the Company's consolidated financial statements.

The following table summarizes the aggregate total consideration for the Company's other acquisitions (in thousands):



	Year ended October 31,
	2019			2018			2017
Cash paid		$243,550			$61,931			$109,346
Less: cash acquired	(2,466		)	(4,000		)	(7,713		)
Cash paid, net	241,084			57,931			101,633
Contingent consideration	2,107			—			—
Fair value of existing equity interest	1,417			—			—
Additional purchase consideration	—			(243		)	1,300
Total consideration		$244,608			$57,688			$102,933

The following table summarizes the allocation of the aggregate total consideration for the Company's other acquisitions to the estimated fair values of the tangible and identifiable intangible assets acquired and liabilities and noncontrolling interests assumed (in thousands):



	Year ended October 31,
	2019		2018		2017
Assets acquired:
Goodwill		$156,177		$38,359		$49,932
Customer relationships	47,553		11,620		29,500
Intellectual property	31,459		6,970		1,950
Trade names	19,216		760		16,750
Property, plant and equipment	18,013		1,777		4,522
Inventories	17,676		6,307		28,410
Accounts receivable	8,673		1,480		15,165
Other assets (including contract assets)	907		126		982
Total assets acquired, excluding cash	299,674		67,399		147,211

Liabilities assumed:
Deferred income taxes	7,455		—		5,432
Accrued expenses	2,937		1,522		6,054
Accounts payable	2,879		671		7,696
Other liabilities	548		—		1,434
Total liabilities assumed	13,819		2,193		20,616

Noncontrolling interests in consolidated subsidiaries	41,247		7,518		23,662

Net assets acquired, excluding cash		$244,608		$57,688		$102,933

The following table summarizes the weighted average amortization period of the definite-lived intangible assets acquired in connection with the Company's other fiscal 2019, 2018 and 2017 acquisitions (in years):



	Year ended October 31,
	2019	2018	2017
Customer relationships	11	7	12
Intellectual property	15	10	13

The allocation of the total consideration for the Company's fiscal 2019 acquisitions to the tangible and identifiable intangible assets acquired and liabilities and noncontrolling interests assumed is preliminary until the Company obtains final information regarding their fair values. However, the Company does not expect any adjustments to such allocations to be material to the Company's consolidated financial statements. The primary items that generated the goodwill recognized were the premiums paid by the Company for the future earnings potential of the

businesses acquired and the value of their assembled workforces that do not qualify for separate recognition, which, in the case of Bernier, REI, Decavo, SST, Freebird, Apex, SST Components, Sensor Technology and A2C benefit both the Company and the noncontrolling interest holders. The fair value of the noncontrolling interests in Bernier, REI, Decavo, SST, Freebird, Apex, SST Components, Sensor Technology and A2C was determined based on the consideration paid by the Company for its controlling ownership interest adjusted for a lack of control that a market participant would consider when estimating the fair value of the noncontrolling interest.

The operating results of the Company's fiscal 2019 acquisitions were included in the Company’s results of operations from each of the effective acquisition dates. The amount of net sales and earnings of the fiscal 2019 acquisitions included in the Consolidated Statement of Operations for the fiscal year ended October 31, 2019 is not material. Had the fiscal 2019 acquisitions occurred as of November 1, 2017, net sales on a pro forma basis for fiscal 2019 would not have been materially different than the reported amounts and net sales on a pro forma basis for fiscal 2018 would have been $1,879.7 million. Net income from consolidated operations, net income attributable to HEICO, and basic and diluted net income per share attributable to HEICO shareholders on a pro forma basis for fiscal 2019 and 2018 would not have been materially different than the reported amounts. The pro forma financial information is presented for comparative purposes only and is not necessarily indicative of the results of operations that actually would have been achieved if the acquisitions had taken place as of November 1, 2017.

The operating results of the Company's fiscal 2018 acquisitions were included in the Company's results of operations from each of the effective acquisition dates. The amount of net sales and earnings of the fiscal 2018 acquisitions included in the Consolidated Statement of Operations for the fiscal year ended October 31, 2018 is not material. Had the fiscal 2018 acquisitions occurred as of November 1, 2016, net sales, net income from consolidated operations, net income attributable to HEICO, and basic and diluted net income per share attributable to HEICO shareholders on a pro forma basis for fiscal 2018 and 2017 would not have been materially different than the reported amounts.

The operating results of the Company's other fiscal 2017 acquisitions were included in the Company's results of operations from each of the effective acquisition dates. The Company's consolidated net sales for the fiscal year ended October 31, 2017 includes $49.0 million from the other fiscal 2017 acquisitions. The amount of earnings of the other fiscal 2017 acquisitions included in the Company's results of operations for the fiscal year ended October 31, 2017 is not material. Had the other fiscal 2017 acquisitions occurred as of November 1, 2015, net sales, net income from consolidated operations, net income attributable to HEICO, and basic and diluted net income per share attributable to HEICO shareholders on a pro forma basis for fiscal 2017 would not have been materially different than the reported amounts.

SELECTED FINANCIAL STATEMENT INFORMATION

12 Months Ended

Oct. 31, 2019

Selected Financial Statement Information [Abstract]

Additional Financial Information Disclosure [Text Block]

SELECTED FINANCIAL STATEMENT INFORMATION

Accounts Receivable



	As of October 31,
(in thousands)	2019			2018
Accounts receivable		$277,992			$240,544
Less: Allowance for doubtful accounts	(3,666		)	(3,258		)
Accounts receivable, net		$274,326			$237,286

Inventories



	As of October 31,
(in thousands)	2019		2018
Finished products		$199,880		$192,758
Work in process	32,548		49,315
Materials, parts, assemblies and supplies	187,891		158,039
Contracts in process	—		1,649
Less: Billings to date	—		(208		)
Inventories, net of valuation reserves		$420,319		$401,553

Prior to the adoption of ASC 606, contracts in process represented accumulated capitalized costs associated with fixed price contracts. Additionally, related progress billings and customer advances (“billings to date”) were classified as a reduction to contracts in process, if any, and any excess was included in accrued expenses and other liabilities. See Note 1, Summary of Significant Accounting Policies - New Accounting Pronouncements, and Note 6, Revenue, for additional information pertaining to the adoption of ASC 606.

Property, Plant and Equipment



	As of October 31,
(in thousands)	2019			2018
Land		$6,820			$5,864
Buildings and improvements	116,997			101,424
Machinery, equipment and tooling	253,127			230,108
Construction in progress	8,382			5,044
	385,326			342,440
Less: Accumulated depreciation and amortization	(211,981		)	(187,701		)
Property, plant and equipment, net		$173,345			$154,739

The amounts set forth above include tooling costs having a net book value of $8.8 million and $8.2 million as of October 31, 2019 and 2018, respectively. Amortization expense on capitalized tooling was $3.1 million, $2.8 million and $2.7 million in fiscal 2019, 2018 and 2017, respectively.

The amounts set forth above also include $11.7 million and $11.9 million of assets under capital leases as of October 31, 2019 and October 31, 2018, respectively. Accumulated depreciation associated with assets under capital leases was $2.1 million and $1.5 million as of October 31, 2019 and October 31, 2018, respectively. See Note 5, Long-Term Debt, for additional information pertaining to capital lease obligations.

Depreciation and amortization expense, exclusive of tooling, on property, plant and equipment was $25.8 million, $23.2 million and $21.9 million in fiscal 2019, 2018 and 2017, respectively.

Accrued Expenses and Other Current Liabilities



	As of October 31,
(in thousands)	2019		2018
Accrued employee compensation and related payroll taxes		$112,602		$97,048
Contract liabilities	23,809		28,262
Accrued customer rebates and credits	17,978		16,861
Contingent consideration and other accrued purchase consideration	497		6,138
Other	24,071		23,205
Accrued expenses and other current liabilities		$178,957		$171,514

The increase in accrued employee compensation and related payroll taxes principally reflects a higher level of accrued performance-based compensation expense resulting from the improved consolidated operating results and the impact of our fiscal 2019 acquisitions. The total customer rebates and credits deducted within net sales in fiscal 2019, 2018 and 2017 was $9.0 million, $9.9 million and $11.0 million, respectively.

Other Long-Term Assets and Liabilities

The Company provides eligible employees, officers and directors of the Company the opportunity to voluntarily defer base salary, bonus payments, commissions, long-term incentive awards and directors fees, as applicable, on a pre-tax basis through the HEICO Corporation Leadership Compensation Plan (“LCP”), a nonqualified deferred compensation plan that conforms to Section 409A of the Internal Revenue Code. The Company matches 50% of the first 6% of base salary deferred by each participant. Director fees that would otherwise be payable in Company common stock may be deferred into the LCP, and, when distributable, are distributed in actual shares of Company common stock. The LCP does not provide for diversification of a director’s assets allocated to Company common stock. The deferred compensation obligation associated with Company common stock is recorded as a component of shareholders’ equity at cost and subsequent changes in fair value are not reflected in operations or shareholders’ equity of the Company. Further, while the Company has no obligation to do so, the LCP also provides the Company the opportunity to make discretionary contributions. The Company’s matching contributions and any discretionary contributions are subject to vesting and forfeiture provisions set forth in the LCP. Company contributions to the LCP charged to income in fiscal 2019, 2018

and 2017 totaled $6.1 million, $5.9 million and $4.6 million, respectively. The aggregate liabilities of the LCP were $151.1 million and $125.8 million as of October 31, 2019 and 2018, respectively, and are classified within other long-term liabilities in the Company’s Consolidated Balance Sheets. The assets of the LCP, totaling $151.9 million and $126.8 million as of October 31, 2019 and 2018, respectively, are classified within other assets in the Company's Consolidated Balance Sheets and principally represent cash surrender values of life insurance policies that are held within an irrevocable trust that may be used to satisfy the obligations under the LCP. Additional information regarding the assets of the LCP may be found in Note 8, Fair Value Measurements.

Research and Development Expenses

The amount of new product research and development ("R&D") expenses included in cost of sales is as follows (in thousands):



	Year ended October 31,
	2019		2018		2017
R&D expenses		$66,630		$57,450		$46,473

Accumulated Other Comprehensive Loss

Changes in the components of accumulated other comprehensive loss during fiscal 2019 and 2018 are as follows (in thousands):



	Foreign Currency Translation			Defined Benefit Pension Plan			Accumulated Other Comprehensive Loss
Balances as of October 31, 2017		($9,533	)		($1,023	)		($10,556	)
Unrealized (loss) gain	(4,837		)	124			(4,713		)
Amortization of unrealized loss	—			13			13
Balances as of October 31, 2018	(14,370		)	(886		)	(15,256		)
Unrealized loss	(619		)	(889		)	(1,508		)
Amortization of unrealized loss	—			25			25
Balances as of October 31, 2019		($14,989	)		($1,750	)		($16,739	)

GOODWILL AND OTHER INTANGIBLE ASSETS

12 Months Ended

Oct. 31, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets Disclosure [Text Block]

GOODWILL AND OTHER INTANGIBLE ASSETS

Changes in the carrying amount of goodwill during fiscal 2019 and 2018 by operating segment are as follows (in thousands):



	Segment						Consolidated
	FSG			ETG			Totals
Balances as of October 31, 2017		$388,606			$692,700			$1,081,306
Goodwill acquired	10,586			27,734			38,320
Adjustments to goodwill	972			(3,003		)	(2,031		)
Foreign currency translation adjustments	(1,470		)	(1,293		)	(2,763		)
Balances as of October 31, 2018	398,694			716,138			1,114,832
Goodwill acquired	12,891			143,286			156,177
Foreign currency translation adjustments	(1,580		)	(765		)	(2,345		)
Adjustments to goodwill	39			—			39
Balances as of October 31, 2019		$410,044			$858,659			$1,268,703

The goodwill acquired during fiscal 2019 and 2018 pertains to the acquisitions consummated in those respective years as discussed in Note 2, Acquisitions, and represents the residual value after the allocation of the total consideration to the tangible and identifiable intangible assets acquired and liabilities and noncontrolling interests assumed. Foreign currency translation adjustments are included in other comprehensive income (loss) in the Company's Consolidated Statements of Comprehensive Income. The adjustments to goodwill represent immaterial measurement period adjustments to the purchase price allocation of certain fiscal 2018 and 2017 acquisitions. The Company estimates that $92 million of the goodwill acquired in fiscal 2019 and most of the goodwill acquired in fiscal 2018 is deductible for income tax purposes. Based on the annual test for goodwill impairment as of October 31, 2019, the Company determined there is no impairment of its goodwill and the fair value of each of the Company’s reporting units significantly exceeded their carrying value.

Identifiable intangible assets consist of the following (in thousands):



	As of October 31, 2019							As of October 31, 2018
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Amortizing Assets:
Customer relationships		$411,076		($162,722	)		$248,354		$373,946		($135,359	)		$238,587
Intellectual property	216,359		(70,169		)	146,190		185,983		(56,055		)	129,928
Licenses	6,559		(4,102		)	2,457		6,559		(3,522		)	3,037
Patents	986		(666		)	320		927		(609		)	318
Non-compete agreements	813		(813		)	—		814		(814		)	—
Trade names	450		(180		)	270		466		(157		)	309
	636,243		(238,652		)	397,591		568,695		(196,516		)	372,179
Non-Amortizing Assets:
Trade names	153,102		—			153,102		134,181		—			134,181
		$789,345		($238,652	)		$550,693		$702,876		($196,516	)		$506,360

The increase in the gross carrying amount of customer relationships, intellectual property and trade names as of October 31, 2019 compared to October 31, 2018 principally relates to such intangible assets recognized in connection with the fiscal 2019 acquisitions (see Note 2, Acquisitions).

Amortization expense related to intangible assets was $53.7 million, $50.1 million and $39.5 million in fiscal 2019, 2018 and 2017, respectively. Amortization expense for each of the next five fiscal years and thereafter is estimated to be $53.8 million in fiscal 2020, $50.9 million in fiscal 2021, $44.4 million in fiscal 2022, $39.1 million in fiscal 2023, $34.6 million in fiscal 2024 and $174.8 million thereafter.

LONG-TERM DEBT

12 Months Ended

Oct. 31, 2019

Debt Disclosure [Abstract]

Long-term Debt [Text Block]

LONG-TERM DEBT

Long-term debt consists of the following (in thousands):



	As of October 31,
	2019			2018
Borrowings under revolving credit facility		$553,000			$523,000
Capital leases and note payable	8,955			9,470
	561,955			532,470
Less: Current maturities of long-term debt	(906		)	(859		)
		$561,049			$531,611

The Company's borrowings under its revolving credit facility mature in fiscal 2023. As of October 31, 2019 and 2018, the weighted average interest rate on borrowings under the Company's revolving credit facility was 3.0% and 3.4%, respectively. The revolving credit

facility contains both financial and non-financial covenants. As of October 31, 2019, the Company was in compliance with all such covenants.

Revolving Credit Facility

In November 2017, the Company entered into a $1.3 billion Revolving Credit Facility Agreement ("Credit Facility") with a bank syndicate, which matures in November 2022. Under certain circumstances, the maturity of the Credit Facility may be extended for two one-year periods. The Credit Facility also includes a feature that will allow the Company to increase the capacity by $350 million to become a $1.65 billion facility through increased commitments from existing lenders or the addition of new lenders. Borrowings under the Credit Facility may be used to finance acquisitions and for working capital and other general corporate purposes, including capital expenditures.

Borrowings under the Credit Facility accrue interest at the Company’s election of the Base Rate or the Eurocurrency Rate, plus in each case, the Applicable Rate (based on the Company’s Total Leverage Ratio). The Base Rate for any day is a fluctuating rate per annum equal to the highest of (i) the Prime Rate; (ii) the Federal Funds Rate plus .50%; and (iii) the Eurocurrency Rate for an Interest Period of one month plus 100 basis points. The Eurocurrency Rate is the rate per annum obtained by dividing LIBOR for the applicable Interest Period by a percentage equal to 1.00 minus the daily average Eurocurrency Reserve Rate for such Interest Period, as such capitalized terms are defined in the Credit Facility. The Applicable Rate for Eurocurrency Rate Loans ranges from 1.00% to 2.00%. The Applicable Rate for Base Rate Loans ranges from 0% to 1.00%. A fee is charged on the amount of the unused commitment ranging from .125% to .30% (depending on the Company’s Total Leverage Ratio). The Credit Facility also includes $100 million sublimits for borrowings made in foreign currencies and for swingline borrowings, and a $50 million sublimit for letters of credit. Outstanding principal, accrued and unpaid interest and other amounts payable under the Credit Facility may be accelerated upon an event of default, as such events are described in the Credit Facility. The Credit Facility is unsecured and contains covenants that require, among other things, the maintenance of a Total Leverage Ratio and an Interest Coverage Ratio, as such capitalized terms are defined in the Credit Facility.

Capital Lease Obligations

The Company's capital lease obligations are principally for manufacturing facilities. The estimated future minimum lease payments of all capital leases for the next five fiscal years and thereafter are as follows (in thousands):



Year ending October 31,
2020		$1,213
2021	1,212
2022	1,203
2023	906
2024	832
Thereafter	5,596
Total minimum lease payments	10,962
Less: amount representing interest	(2,327		)
Present value of minimum lease payments		$8,635

REVENUE (Notes)

12 Months Ended

Oct. 31, 2019

Revenue from Contract with Customer [Abstract]

Revenue from Contract with Customer [Text Block]

REVENUE

The Company recognizes revenue when it transfers control of a promised good or service to a customer in an amount that reflects the consideration it expects to receive in exchange for the good or service. The Company’s performance obligations are satisfied and control is transferred either at a point-in-time or over-time. The majority of the Company’s revenue is recognized at a point-in-time when control is transferred, which is generally evidenced by the shipment or delivery of the product to the customer, a transfer of title, a transfer of the significant risks and rewards of ownership, and customer acceptance. For certain contracts under which the Company produces products with no alternative use and for which it has an enforceable right to recover costs incurred plus a reasonable profit margin for work completed to date and for certain other contracts under which the Company creates or enhances a customer-owned asset while performing repair and overhaul services, control is transferred to the customer over-time. The Company recognizes revenue using an over-time recognition model for these types of contracts.

Details of the products and services provided by the Company can be found within Disaggregation of Revenue which follows within this Note 6.

Contracts with Customers and Performance Obligations

The Company accounts for a contract with a customer when it has approval and commitment from both parties, the rights of the parties are identified, the payment terms are identified, the contract has commercial substance, and it is probable that the Company will collect the consideration to which it is entitled to receive. Customer payment terms related to the sale of products and the rendering of services vary by Company subsidiary and product line. The

time between receipt of payment and recognition of revenue for satisfaction of the related performance obligation is not significant.

A performance obligation is a promise within a contract to transfer a distinct good or service to the customer in exchange for payment and is the unit of account for recognizing revenue. A contract’s transaction price is allocated to each distinct performance obligation and recognized as revenue when or as the performance obligation is satisfied. The majority of the Company’s contracts have a single performance obligation to transfer goods or services. For contracts with more than one performance obligation, the Company allocates the transaction price to each performance obligation based on its estimated standalone selling price. When standalone selling prices are not available, the transaction price is allocated using an expected cost plus margin approach as pricing for such contracts is typically negotiated on the basis of cost.

The Company accounts for contract modifications prospectively when the remaining goods or services are distinct and on a cumulative catch-up basis when the remaining goods or services are not distinct.

The Company provides assurance type warranties on many of its products and services. Since customers cannot purchase such warranties independently of the products or services under contract and they are not priced separately, warranties are not separate performance obligations.

Contract Estimates

The Company utilizes the cost-to-cost method as a measure of progress for performance obligations that are satisfied over-time as it believes this input method best represents the transfer of control to the customer. Under this method, revenue for the current period is recorded at an amount equal to the ratio of costs incurred to date divided by total estimated contract costs multiplied by (i) the transaction price, less (ii) cumulative revenue recognized in prior periods. Contract costs include all direct material and labor costs and those indirect costs related to contract performance, such as indirect labor, supplies, tools, repairs and depreciation.

Certain of the Company’s contracts give rise to variable consideration when they contain items such as customer rebates, credits, volume purchase discounts, penalties and other provisions that may impact the total consideration the Company will receive. The Company includes variable consideration in the transaction price generally by applying the most likely amount method of the consideration that it expects to be entitled to receive based on an assessment of all available information (i.e., historical experience, current and forecasted performance) and only to the extent it is probable that a significant reversal of revenue recognized will not occur when the uncertainty is resolved. The Company estimates variable consideration by applying the most likely amount method when there are a limited number of outcomes related to the resolution of the variable consideration.

Changes in estimates that result in adjustments to net sales and cost of sales are recognized as necessary in the period they become known on a cumulative catch-up basis. Changes in estimates did not have a material effect on net income from consolidated operations in fiscal 2019, 2018 and 2017.

Practical Expedients and Optional Exemptions

The Company has elected the following practical expedients and optional exemptions allowed under ASC 606:


•	The majority of the Company’s performance obligations related to customer contracts are satisfied within one year. As such, the Company has elected to disclose remaining performance obligations only for contracts with an original duration of greater than one year.


•	The Company has elected to record all shipping and handling activities as fulfillment activities. When revenue is recognized in advance of incurring shipping and handling costs, the costs related to the shipping and handling activities are accrued.

•

For certain contracts with similar characteristics and for which revenue is recognized using an over-time model, the Company uses a portfolio approach to estimate the amount of revenue to recognize. For each portfolio of contracts, the respective work in process and/or finished goods inventory balances are identified and the portfolio-specific margin is applied to estimate the pro rata portion of the transaction price to recognize in relation to the costs incurred. This approach is utilized only when the resulting revenue recognition is not expected to be materially different than if the accounting was applied to the individual contracts.


•	The Company does not adjust the amount of revenue to be recognized under a customer contract for the effects of the time value of money when the timing difference between receipt of payment and recognition of revenue for satisfaction of the related performance obligation is less than one year.


•	Sales commissions and any other costs of obtaining a customer contract with a duration of one year or less are expensed as incurred.

Contract Balances

Contract assets (unbilled receivables) represent revenue recognized on contracts using an over-time recognition model in excess of amounts invoiced to the customer. Contract liabilities (deferred revenue) represent customer advances and billings in excess of revenue recognized and are included within accrued expenses and other current liabilities in the Company’s Consolidated Balance Sheet.

Changes in the Company’s contract assets and liabilities during fiscal 2019 are as follows (in thousands):



	October 31, 2019		November 1, 2018		Change

Contract assets		$43,132		$54,272		($11,140	)
Contract liabilities	23,809		19,674		4,135
Net contract assets		$19,323		$34,598		($15,275	)

The decrease in the Company's contract assets during fiscal 2019 mainly occurred within the ETG and principally reflects billings on certain customer contracts made during the year in excess of the amounts recorded as additional unbilled receivables for contracts using an over-time recognition model.

The increase in the Company's contract liabilities during fiscal 2019 principally reflects the receipt of payment on a certain contract in advance of control transferring to the customer as well as new customer deposits on certain customer contracts, partially offset by reductions to contract liabilities from customer deposits recognized as revenue.

The amount of revenue that the Company recognized during fiscal 2019 that was included in contract liabilities as of the beginning of fiscal 2019 was $16.5 million.

Remaining Performance Obligations

As of October 31, 2019, the Company had $453.6 million of remaining performance obligations associated with contracts with an original duration of greater than one year pertaining to the majority of the products offered by the ETG and the FSG's aftermarket replacement parts and specialty products product line. The Company will recognize net sales as these obligations are satisfied. The Company expects to recognize $275.7 million of this amount during fiscal 2020 and $177.9 million thereafter, of which the majority is expected to occur in fiscal 2021.

Disaggregation of Revenue

The following table summarizes the Company’s net sales by product line for each operating segment (in thousands):



	Year Ended October 31,
	2019			2018			2017
Flight Support Group:
Aftermarket replacement parts ⁽¹⁾		$678,001			$582,562			$489,644
Repair and overhaul parts and services ⁽²⁾	299,323			286,454			270,482
Specialty products ⁽³⁾	262,859			228,921			207,414
Total net sales	1,240,183			1,097,937			967,540

Electronic Technologies Group:
Electronic component parts for defense, space and aerospace equipment ⁽⁴⁾	633,685			547,088			420,991
Electronic component parts for equipment in various other industries ⁽⁵⁾	200,837			154,739			153,270
Total net sales	834,522			701,827			574,261

Intersegment sales	(19,058		)	(22,043		)	(16,988		)

Total consolidated net sales		$2,055,647			$1,777,721			$1,524,813


⁽¹⁾	Includes various jet engine and aircraft component replacement parts.


⁽²⁾	Includes primarily the sale of parts consumed in various repair and overhaul services on selected jet engine and aircraft components, avionics, instruments, composites and flight surfaces of commercial and military aircraft.


⁽³⁾	Includes primarily the sale of specialty components such as thermal insulation blankets, renewable/reusable insulation systems, advanced niche components, complex composite assemblies, and expanded foil mesh.

⁽⁴⁾

Includes various component parts such as electro-optical infrared simulation and test equipment, electro-optical laser products, electro-optical, microwave and other power equipment, high-speed interface products, power conversion products, underwater locator beacons, emergency locator transmission beacons, traveling wave tube amplifiers, microwave power modules, three-dimensional microelectronic and stacked memory products, crashworthy and ballistically self-sealing auxiliary fuel systems, radio frequency (RF) and microwave amplifiers, transmitters and receivers, high performance communications and electronic intercept receivers and tuners, high performance active antenna systems, and technical surveillance countermeasures equipment.


⁽⁵⁾	Includes various component parts such as electromagnetic and radio interference shielding, high voltage interconnection devices, high voltage advanced power electronics, harsh environment connectivity products, custom molded cable assemblies, and silicone material for a variety of demanding applications.

The following table summarizes the Company’s net sales by industry for each operating segment (in thousands):



	Year ended October 31,
	2019			2018			2017
Flight Support Group:
Aerospace		$1,004,088			$890,059			$781,344
Defense and Space	190,076			163,330			146,708
Other ⁽¹⁾	46,019			44,548			39,488
Total net sales	1,240,183			1,097,937			967,540

Electronic Technologies Group:
Defense and Space	531,029			452,714			368,234
Other ⁽²⁾	217,889			177,878			157,195
Aerospace	85,604			71,235			48,832
Total net sales	834,522			701,827			574,261

Other, primarily corporate and intersegment	(19,058		)	(22,043		)	(16,988		)

Total consolidated net sales		$2,055,647			$1,777,721			$1,524,813


⁽¹⁾	Principally industrial products.

⁽²⁾

Principally other electronics and medical products.

FAIR VALUE MEASUREMENTS

12 Months Ended

Oct. 31, 2019

Fair Value Disclosures [Abstract]

Fair Value Disclosures [Text Block]

FAIR VALUE MEASUREMENTS

The Company's assets and liabilities that were measured at fair value on a recurring basis are set forth by level within the fair value hierarchy in the following tables (in thousands):



	As of October 31, 2019
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
Assets:
Deferred compensation plan:
Corporate-owned life insurance		$—		$151,871		$—		$151,871
Money market funds	20		—		—		20
Total assets		$20		$151,871		$—		$151,891

Liabilities:
Contingent consideration		$—		$—		$18,326		$18,326



	As of October 31, 2018
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
Assets:
Deferred compensation plans:
Corporate-owned life insurance		$—		$123,255		$—		$123,255
Money market funds	3,560		—		—		3,560
Equity securities	3,179		—		—		3,179
Mutual funds	1,437		—		—		1,437
Other	1,306		—		—		1,306
Total assets		$9,482		$123,255		$—		$132,737

Liabilities:
Contingent consideration		$—		$—		$20,875		$20,875

The Company maintains the HEICO Corporation Leadership Compensation Plan (the "LCP"), which is a non-qualified deferred compensation plan. The assets of the LCP principally represent cash surrender values of life insurance policies, which derive their fair values from investments in mutual funds that are managed by an insurance company, and are classified within Level 2 and valued using a market approach. Certain other assets of the LCP represent investments in money market funds that are classified within Level 1. The assets of the LCP are held within an irrevocable trust and classified within other assets in the Company’s Consolidated Balance Sheets.

The Company previously maintained another non-qualified deferred compensation plan. The assets and liabilities of this plan were each $5.9 million as of October 31, 2018 and classified within other assets and other long-term liabilities, respectively, in the Company's Consolidated Balance Sheet. During fiscal 2019, the plan's assets were liquidated and distribution payments were made to the remaining plan participants in accordance with their elections.

As part of the agreement to acquire a subsidiary by the FSG in fiscal 2019, the Company may be obligated to pay contingent consideration of $6.4 million in fiscal 2022 should the acquired entity meet a certain earnings objective during the second and third years following the acquisition. As of October 31, 2019, the estimated fair value of the contingent consideration was $1.1 million.

As part of the agreement to acquire a subsidiary by the ETG in fiscal 2017, the Company may be obligated to pay contingent consideration of $20.0 million in fiscal 2023 should the acquired entity meet a certain earnings objective during the first six years following the acquisition. As of October 31, 2019, the estimated fair value of the contingent consideration was $16.7 million. The increase in the fair value of the contingent consideration as of October 31, 2019 as compared to the $13.9 million accrued as of October 31, 2018 is principally attributable to a reduction in the discount rate used to present value the potential future obligation and higher than originally estimated earnings of the acquired entity during the earnout period.

As part of the agreement to acquire certain assets of a company by the ETG in fiscal 2016, the Company may be obligated to pay contingent consideration of up to $1.1 million in aggregate during the first two years following the third anniversary of the acquisition should the acquired entity meet certain earnings objectives during this same time period. During fiscal 2019, the Company paid $.3 million of contingent consideration based on the actual financial performance of the acquired entity during the third year following the acquisition. As of October 31, 2019, the estimated fair value of the remaining contingent consideration was $.5 million.

As part of the agreement to acquire a subsidiary by the FSG in fiscal 2015, the Company paid contingent consideration of €6.1 million, or $6.8 million, during the third quarter of fiscal 2019 based on the actual operating results of the acquired entity during the fourth year following the acquisition. The increase in the amount paid as compared to the €5.1 million, or $5.8 million, accrued as of October 31, 2018 was principally due to the higher actual than anticipated earnings of the acquired entity.

The estimated fair value of the contingent consideration arrangements described above are classified within Level 3 and were determined using probability-based scenario analyses. Under this method, a set of discrete potential future subsidiary earnings was determined using internal estimates based on various revenue growth rate assumptions for each scenario. A probability of likelihood was assigned to each discrete potential future earnings estimate and the resultant contingent consideration was calculated. The resulting probability-weighted contingent consideration amounts were discounted using a weighted average discount rate reflecting the credit risk of HEICO. Changes in either the revenue growth rates, related earnings or the

discount rate could result in a material change to the amount of contingent consideration accrued and such changes will be recorded in the Company's consolidated statements of operations.

The Level 3 inputs used to derive the estimated fair value of the Company's contingent consideration liability as of October 31, 2019 are as follows:



	Fiscal 2019 Acquisition			Fiscal 2017 Acquisition			Fiscal 2016 Acquisition
Compound annual revenue growth rate range	(7%)	-	9%	(3%)	-	10%	(11	%)	-	3%
Weighted average discount rate	5.7%			4.6%			3.0%

Changes in the Company’s contingent consideration liability measured at fair value on a recurring basis using unobservable inputs (Level 3) during fiscal 2019 and 2018 are as follows (in thousands):



	Liabilities
Balance as of October 31, 2017		$27,573
Payment of contingent consideration	(5,425		)
Decrease in accrued contingent consideration, net	(1,365		)
Foreign currency transaction adjustments	92
Balance as of October 31, 2018	20,875
Increase in accrued contingent consideration, net	2,630
Contingent consideration related to acquisition	2,107
Payment of contingent consideration	(7,178		)
Foreign currency transaction adjustments	(108		)
Balance as of October 31, 2019		$18,326

Included in the accompanying Consolidated Balance Sheet under the following captions:
Accrued expenses and other current liabilities		$497
Other long-term liabilities	17,829
		$18,326

The Company recorded the (decrease) increase in accrued contingent consideration and foreign currency transaction adjustments set forth in the table above within SG&A expenses in the Company's Consolidated Statements of Operations.

The Company did not have any transfers between Level 1 and Level 2 fair value measurements during fiscal 2019 and 2018.

The carrying amounts of the Company’s cash and cash equivalents, accounts receivable, trade accounts payable and accrued expenses and other current liabilities approximate fair value as of October 31, 2019 due to the relatively short maturity of the respective instruments. The carrying amount of long-term debt approximates fair value due to its variable interest rates.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

INCOME TAXES

12 Months Ended

Oct. 31, 2019

Income Tax Disclosure [Abstract]

Income Tax Disclosure [Text Block]

INCOME TAXES

The components of income before income taxes and noncontrolling interests are as follows (in thousands):



	Year ended October 31,
	2019		2018		2017
Domestic		$386,584		$309,123		$264,420
Foreign	51,257		47,163		33,540
Income before taxes and noncontrolling interests		$437,841		$356,286		$297,960

The components of the provision for income taxes on income before income taxes and noncontrolling interests are as follows (in thousands):



	Year ended October 31,
	2019			2018			2017
Current:
Federal		$56,670			$61,548			$85,047
State	12,795			9,420			6,820
Foreign	15,027			12,608			9,529
	84,492			83,576			101,396
Deferred:
Federal	(3,140		)	(13,115		)	(9,661		)
State	(1,263		)	1,578			(499		)
Foreign	(1,989		)	(1,439		)	(936		)
	(6,392		)	(12,976		)	(11,096		)
Total income tax expense		$78,100			$70,600			$90,300

A reconciliation of the federal statutory income tax rate to the Company’s effective tax rate is as follows:



	Year ended October 31,
	2019		2018		2017
Federal statutory income tax rate (blended rate in fiscal 2018)	21.0	%	23.3	%	35.0	%
State taxes, net of federal income tax benefit	3.0	%	2.9	%	1.9	%
Tax benefit related to stock option exercises	(3.8	%)	(.5	%)	(1.0	%)
Discrete net tax benefit related to Tax Act	—	%	(3.4	%)	—	%
Research and development tax credits	(1.7	%)	(2.0	%)	(1.8	%)
Foreign derived intangible income deduction	(1.4	%)	—	%	—	%
Tax-exempt (gains) losses on corporate-owned life insurance policies	(.6	%)	.1	%	(1.8	%)
Nondeductible compensation	.8	%	.2	%	—	%
Domestic production activities tax deduction	—	%	(.8	%)	(1.1	%)
Other, net	.5	%	—	%	(.9	%)
Effective tax rate	17.8	%	19.8	%	30.3	%

In December 2017, the United States ("U.S.") government enacted comprehensive tax legislation commonly referred to as the Tax Cuts and Jobs Act (the “Tax Act”). The Tax Act contains significant changes to previous tax law, some of which became immediately effective in fiscal 2018 including, among other things, a reduction in the U.S. federal statutory tax rate from 35% to 21% effective January 1, 2018 resulting in a blended rate of 23.3% for fiscal 2018 and the implementation of a territorial tax system resulting in a one-time transition tax on the unremitted earnings of the Company’s foreign subsidiaries. Certain other provisions of the Tax Act became effective for HEICO in fiscal 2019 including a new tax on Global Intangible Low-Taxed Income (“GILTI”), a new deduction for Foreign-Derived Intangible Income (“FDII”), the

repeal of the domestic production activity deduction and increased limitations on the deductibility of certain executive compensation. As a result of the Tax Act, the Company remeasured its U.S. federal net deferred tax liabilities and recorded a discrete tax benefit of $16.5 million in fiscal 2018. Further, the Company recorded a provisional discrete tax expense of $4.4 million in fiscal 2018 related to a one-time transition tax on the unremitted earnings of the Company's foreign subsidiaries, which it intends to pay over the eight-year period allowed for in the Tax Act.

The Company’s effective tax rate in fiscal 2019 decreased to 17.8% from 19.8% in fiscal 2018. The decrease in the Company's effective tax rate in fiscal 2019 is mainly attributable to a $14.3 million larger tax benefit in fiscal 2019 from stock option exercises compared to fiscal 2018 and the reduction in the federal tax rate from a blended rate of 23.3% in fiscal 2018 to 21% in fiscal 2019, partially offset by the net impact of the previously mentioned discrete tax amounts recorded in fiscal 2018. The provisions of the Tax Act that became effective for HEICO in fiscal 2019 did not have a material net effect on the Company's effective tax rate.

The Company’s effective tax rate in fiscal 2018 decreased to 19.8% from 30.3% in fiscal 2017. The decrease principally reflects the previously mentioned discrete tax benefit from the remeasurement of the Company’s U.S. federal net deferred tax liabilities and the net benefit of a lower federal statutory income tax rate, which were partially offset by the aforementioned one-time transition tax expense. Further, the decrease in fiscal 2018 was slightly moderated by an unfavorable impact from lower tax-exempt unrealized gains in the cash surrender values of life insurance policies related to the HEICO Corporation Leadership Compensation Plan ("HEICO LCP").

The Company files income tax returns in the U.S. federal jurisdiction and in multiple state jurisdictions. The Company is also subject to income taxes in certain jurisdictions outside the U.S., none of which are individually material to the accompanying consolidated financial statements. Generally, the Company is no longer subject to U.S. federal, state or foreign examinations by tax authorities for years prior to fiscal 2015.

Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. The Company believes that it is more likely than not that it will generate sufficient future taxable income to utilize all of its deferred tax assets and has therefore not recorded a valuation allowance on any such asset.

Significant components of the Company’s deferred tax assets and liabilities are as follows (in thousands):



	As of October 31,
	2019			2018
Deferred tax assets:
Deferred compensation liability		$35,437			$31,152
Inventories	23,858			22,204
Share-based compensation	10,206			9,811
Bonus accrual	6,463			4,474
Customer rebates accrual	2,324			1,526
Vacation accrual	1,452			1,456
Other	8,806			7,152
Total deferred tax assets	88,546			77,775

Deferred tax liabilities:
Goodwill and other intangible assets	(122,075		)	(112,533		)
Property, plant and equipment	(14,137		)	(11,615		)
Adoption of ASC 606	(3,277		)	—
Other	(553		)	(271		)
Total deferred tax liabilities	(140,042		)	(124,419		)
Net deferred tax liability		($51,496	)		($46,644	)

As of October 31, 2019 and 2018, the Company’s liability for gross unrecognized tax benefits related to uncertain tax positions was $2.7 million and $2.1 million, respectively, of which $2.1 million and $1.7 million, respectively, would decrease the Company’s income tax expense and effective income tax rate if the tax benefits were recognized. A reconciliation of the activity related to the liability for gross unrecognized tax benefits during fiscal 2019 and 2018 is as follows (in thousands):



	Year ended October 31,
	2019			2018
Balances as of beginning of year		$2,100			$2,040
Increases related to current year tax positions	653			591
Increases related to prior year tax positions	45			20
Settlements	—			(394		)
Lapses of statutes of limitations	(128		)	(157		)
Balances as of end of year		$2,670			$2,100

SHAREHOLDERS' EQUITY	12 Months Ended
SHAREHOLDERS' EQUITY	Oct. 31, 2019
Stockholders' Equity Note [Abstract]
Stockholders' Equity Note Disclosure [Text Block]	SHAREHOLDERS’ EQUITY Common Stock and Class A Common Stock The Company has two classes of common stock that are virtually identical in all economic respects except voting rights. Each share of Common Stock is entitled to one vote per share. Each share of Class A Common Stock is entitled to a 1/10 vote per share. Holders of the Company’s common stock are entitled to receive dividends and other distributions payable in cash, property, stock or otherwise, when and if declared by the Board of Directors. In the event of liquidation, after payment of debts and other liabilities of the Company, the remaining assets of the Company will be distributable ratably among the holders of both classes of common stock. Share Repurchases In 1990, the Company's Board of Directors authorized a share repurchase program, which allows the Company to repurchase shares of Company common stock in the open market or in privately negotiated transactions at the Company's discretion, subject to certain restrictions included in the Company's revolving credit agreement. As of October 31, 2019, the maximum number of shares that may yet be purchased under this program was 4,886,353 of either or both of the Company's Class A Common Stock and the Company's Common Stock. The repurchase program does not have a fixed termination date. During fiscal 2019, 2018 and 2017, the Company did not repurchase any shares of Company common stock under this program. During fiscal 2019, the Company repurchased an aggregate 476,586 shares and 111,730 shares of Common Stock and Class A Common Stock, respectively, at a total cost of $53.1 million and $10.9 million, respectively. During fiscal 2018, the Company repurchased an aggregate 332,140 shares and 18,145 shares of Common Stock and Class A Common Stock, respectively, at a total cost of $23.9 million and $1.1 million, respectively. The shares repurchased represent shares tendered as payments to satisfy employee withholding taxes due upon exercises of stock option awards. The shares repurchased in fiscal 2019 and 2018 did not impact the number of shares authorized for future purchase under the Company’s share repurchase program and are reflected as redemptions of common stock related to stock option exercises in the Company's Consolidated Statements of Shareholders' Equity and Consolidated Statements of Cash Flows. Such share repurchases in fiscal 2017 were not material. Noncontrolling Interests Consistent with the Company’s past practice of increasing its ownership in certain non-wholly owned subsidiaries, on June 28, 2019, HEICO Aerospace paid dividends to HEICO and Lufthansa Technik AG (“LHT”) in proportion to their ownership interest in HEICO Aerospace of 80% and 20%, respectively (the “Transaction”). LHT received a cash dividend of $91.5 million that was funded principally using proceeds from the Company’s revolving credit facility. HEICO effectively received as its dividend the 20% noncontrolling interest held by LHT in eight of the Company’s existing subsidiaries within its HEICO Aerospace subsidiary that are principally part of the FSG’s repair and overhaul parts and services product line. HEICO did not record any gain or loss in connection with the Transaction. Immediately following the Transaction, HEICO transferred the eight businesses to HEICO Flight Support Corp., a wholly owned subsidiary of HEICO. LHT remains a 20% owner in HEICO Aerospace, a designer and manufacturer of jet engine and aircraft component replacement parts.

SHARE-BASED COMPENSATION

12 Months Ended

Oct. 31, 2019

Share-based Payment Arrangement [Abstract]

Share-based Payment Arrangement [Text Block]

SHARE-BASED COMPENSATION

The Company currently has one stock option plan, the HEICO Corporation 2018 Incentive Compensation Plan ("2018 Plan"), which enables the Company to grant various forms of share-based compensation awards including stock options, restricted stock, restricted stock awards and stock appreciation rights. The 2018 Plan became effective in fiscal 2018 and replaced the Company's 2012 Incentive Compensation Plan (“2012 Plan”). Options outstanding under the Company's 2012 Plan, 2002 Stock Option Plan and Non-Qualified Stock Option Plan may be exercised pursuant to their terms. The total number of shares approved by the shareholders of the Company for the 2018 Plan is 5.0 million plus any options outstanding under the 2012 Plan as of the 2018 Plan's effective date that are subsequently forfeited or expire. A total of approximately 8.8 million shares of the Company's common stock are reserved for issuance to employees, directors, officers and consultants as of October 31, 2019, including 4.7 million shares currently under option and 4.1 million shares available for future grants.

Stock options granted pursuant to the 2018 Plan may be designated as Common Stock and/or Class A Common Stock in such proportions as shall be determined by the Board of Directors or the Stock Option Plan Committee at its sole discretion. The exercise price per share of a stock option granted under the 2018 Plan may not be less than the fair market value of the designated class of Company common stock as of the date of grant and stock option grants vest ratably over a period specified as of the date of grant (generally five years) and expire ten years after the date of grant. Options issued under the 2018 Plan may be designated as incentive stock options or non-qualified stock options, but only employees are eligible to receive incentive stock options and no incentive stock options were outstanding as of October 31, 2019. The 2018 Plan will terminate no later than the tenth anniversary of its effective date.

Information concerning share-based activity for each of the last three fiscal years ended October 31 is as follows (in thousands, except per share data):



			Shares Under Option
	Shares Available For Grant		Shares		Weighted Average Exercise Price
Outstanding as of October 31, 2016	2,016		6,520			$14.23
Granted	(1,186	)	1,186			$41.37
Exercised	—		(409	)		$15.27
Outstanding as of October 31, 2017	830		7,297			$18.58
Shares approved by the Company's shareholders for the 2018 Incentive Compensation Plan	5,000		—			$—
Cancelled unissued shares under the 2012 Incentive Compensation Plan	(830	)	—			$—
Granted	(412	)	412			$65.64
Exercised	—		(1,285	)		$10.54
Cancelled	24		(24	)		$28.85
Outstanding as of October 31, 2018	4,612		6,400			$23.19
Granted	(538	)	538			$73.30
Exercised	—		(2,235	)		$12.98
Cancelled	11		(11	)		$49.79
Outstanding as of October 31, 2019	4,085		4,692			$33.73

Information concerning stock options outstanding (all of which are vested or expected to vest) and stock options exercisable by class of common stock as of October 31, 2019 is as follows (in thousands, except per share and contractual life data):



	Options Outstanding
	Number Outstanding	Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (Years)	Aggregate Intrinsic Value
Common Stock	1,682		$35.91	5.6		$147,012
Class A Common Stock	3,010		$32.52	5.8	188,927
	4,692		$33.73	5.7		$335,939



	Options Exercisable
	Number Outstanding	Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (Years)	Aggregate Intrinsic Value
Common Stock	1,030		$22.81	4.2		$103,538
Class A Common Stock	1,755		$20.85	4.2	130,618
	2,785		$21.57	4.2		$234,156

Information concerning stock options exercised is as follows (in thousands):



	Year ended October 31,
	2019		2018		2017
Cash proceeds from stock option exercises		$8,547		$4,031		$5,659
Tax benefit realized from stock option exercises	16,490		2,162		3,087
Intrinsic value of stock option exercises	204,901		75,152		10,376

Net income from consolidated operations for the fiscal years ended October 31, 2019, 2018 and 2017 includes compensation expense of $10.3 million, $9.3 million and $7.4 million, respectively, and an income tax benefit of $2.0 million, $2.2 million and $2.8 million, respectively, related to the Company’s stock options. Substantially all of the stock option compensation expense was recorded as a component of SG&A expenses in the Company’s Consolidated Statements of Operations. As of October 31, 2019, there was $28.4 million of pre-tax unrecognized compensation expense related to nonvested stock options, which is expected to be recognized over a weighted average period of approximately 3.2 years. The total fair value of stock options that vested in fiscal 2019, 2018 and 2017 was $8.9 million, $8.5 million and $5.3 million, respectively. If there were a change in control of the Company, all of the unvested options outstanding as of October 31, 2019 would become immediately exercisable.

The fair value of each stock option grant in fiscal 2019, 2018 and 2017 was estimated on the date of grant using the Black-Scholes option-pricing model based on the following weighted average assumptions:



	Year ended October 31,
	2019				2018				2017
	Common Stock		Class A Common Stock		Common Stock		Class A Common Stock		Common Stock		Class A Common Stock
Expected stock price volatility	28.52	%	24.81	%	31.00	%	27.69	%	37.89	%	28.18	%
Risk-free interest rate	2.52	%	2.69	%	2.83	%	2.81	%	2.44	%	2.06	%
Dividend yield	.22	%	.22	%	.24	%	.29	%	.26	%	.31	%
Forfeiture rate	.00	%	.00	%	.00	%	.00	%	.00	%	.00	%
Expected option life (years)	8		6		9		8		9		7
Weighted average fair value	$33.88		$19.64		$30.00		$20.93		$21.36		$12.47

EMPLOYEE RETIREMENT PLANS

12 Months Ended

Oct. 31, 2019

Retirement Benefits [Abstract]

Pension and Other Postretirement Benefits Disclosure [Text Block]

EMPLOYEE RETIREMENT PLANS

The HEICO Savings and Investment Plan (the “401(k) Plan”) is a qualified defined contribution retirement plan under which eligible employees of the Company and its participating subsidiaries may make Elective Deferral Contributions up to the limitations set forth in Section 402(g) of the Internal Revenue Code. The Company generally makes a 50% Employer Matching Contribution, as determined by the Board of Directors, based on a participant’s Elective Deferral Contribution up to 6% of the participant’s Compensation for the Elective Deferral Contribution period. The 401(k) Plan also provides that the Company may make additional Employer Contributions. Employer Contributions may be contributed in the form of the Company’s common stock or cash, as determined by the Company. Employer Contributions awarded in the form of Company common stock are valued based on the fair value of the underlying shares as of the effective date of contribution. Employer Contributions may be diversified by a participant into any of the participant-directed investment options of the 401(k) Plan; however, Employee Contributions may not be invested in Company common stock. Unless specified otherwise, all capitalized terms herein are defined in the 401(k) Plan document.

Participants receive 100% vesting in Employee Contributions and on cash dividends received on Company common stock. Vesting in Employer Contributions is based on a participant’s number of Years of Service. Employer Contributions to the 401(k) Plan charged to income in fiscal 2019, 2018 and 2017 totaled $9.5 million, $8.0 million and $7.8 million, respectively, and were made through the issuance of new shares of Company common stock and the use of forfeited shares within the 401(k) Plan.

Information concerning share-based activity pertaining to the 401(k) Plan for each of the last three fiscal years ended October 31 is as follows (in thousands):



	Common Stock		Class A Common Stock
Shares available for issuance as of October 31, 2016	491		491
Issuance of common stock to the 401(k) Plan	(93	)	(93	)
Shares available for issuance as of October 31, 2017	398		398
Issuance of common stock to the 401(k) Plan	(65	)	(65	)
Shares available for issuance as of October 31, 2018	333		333
Issuance of common stock to the 401(k) Plan	(53	)	(53	)
Shares available for issuance as of October 31, 2019	280		280

REDEEMABLE NONCONTROLLING INTERESTS

12 Months Ended

Oct. 31, 2019

Temporary Equity Disclosure [Abstract]

Temporary Equity Redeemable Noncontrolling Interests [Text Block]

REDEEMABLE NONCONTROLLING INTERESTS

The holders of equity interests in certain of the Company’s subsidiaries have rights (“Put Rights”) that may be exercised on varying dates causing the Company to purchase their equity interests through fiscal 2029. The Put Rights, all of which relate either to common shares or membership interests in limited liability companies, provide that the cash consideration to be paid for their equity interests (the “Redemption Amount”) be at fair value or at a formula that management intended to reasonably approximate fair value based solely on a multiple of future earnings over a measurement period. The Redemption Amounts were determined using probability-adjusted internal estimates of future subsidiary earnings while considering the earliest exercise date, the measurement period and any applicable fair value adjustments. Management's estimate of the aggregate Redemption Amount of all Put Rights that the Company could be required to pay is as follows (in thousands):



	As of October 31,
	2019		2018
Redeemable at fair value		$136,611		$83,524
Redeemable based on a multiple of future earnings	51,653		48,522
Redeemable noncontrolling interests		$188,264		$132,046

A summary of the Put Rights associated with the redeemable noncontrolling interests in certain of the Company’s subsidiaries as of October 31, 2019 is as follows:



Subsidiary Acquisition Year	Operating Segment	Company Ownership Interest	Earliest Put Right Year	Purchase Period (Years)
2005	ETG	95.9%	2020 ⁽¹⁾	4 ⁽²⁾
2006	FSG	80.1%	2020 ⁽¹⁾	4
2008	FSG	82.3%	2020 ⁽¹⁾	5
2009	ETG	82.5%	2020 ⁽¹⁾	1
2012	ETG	78.0%	2020 ⁽¹⁾	2
2012	FSG	84.0%	2020 ⁽¹⁾	4
2012	FSG	80.1%	2020 ⁽¹⁾	4
2015	FSG	80.0%	2020 ⁽¹⁾	4
2015	FSG	80.1%	2020	4
2015	ETG	80.1%	2020	2
2015	FSG	80.1%	2022	4
2017	FSG	80.1%	2022	2 ⁽³⁾
2018	ETG	85.0%	2021	1
2019	ETG	92.7%	2023	4
2019	ETG	85.0%	2024	4
2019	FSG	80.1%	2026	4
2019	ETG	75.0%	2024	4


⁽¹⁾Currently puttable
⁽²⁾A portion is to be purchased in a lump sum
⁽³⁾ The second purchase is to be made two years after the first Put Right Year

The estimated aggregate Redemption Amount of the Put Rights that are currently puttable or becoming puttable during fiscal 2020 is approximately $106.7 million, of which approximately $47.8 million would be payable in fiscal 2020 should all of the eligible associated noncontrolling interest holders elect to exercise their Put Rights during fiscal 2020. Additionally, the Company has call rights to purchase the equity interests of the noncontrolling holders over the same purchase period as the Put Rights.

NET INCOME PER SHARE ATTRIBUTABLE TO HEICO SHAREHOLDERS

12 Months Ended

Oct. 31, 2019

Earnings Per Share [Abstract]

Earnings Per Share [Text Block]

NET INCOME PER SHARE ATTRIBUTABLE TO HEICO SHAREHOLDERS

The computation of basic and diluted net income per share attributable to HEICO shareholders is as follows (in thousands, except per share data):



	Year ended October 31,
	2019		2018		2017
Numerator:
Net income attributable to HEICO		$327,896		$259,233		$185,985

Denominator:
Weighted average common shares outstanding - basic	133,640		132,543		131,703
Effect of dilutive stock options	3,710		4,153		3,885
Weighted average common shares outstanding - diluted	137,350		136,696		135,588

Net income per share attributable to HEICO shareholders:
Basic		$2.45		$1.96		$1.41
Diluted		$2.39		$1.90		$1.37

Anti-dilutive stock options excluded	330		512		799

QUARTERLY FINANCIAL INFORMATION (UNAUDITED)

12 Months Ended

Oct. 31, 2019

Quarterly Financial Information Disclosure [Abstract]

Quarterly Financial Information [Text Block]

QUARTERLY FINANCIAL INFORMATION (UNAUDITED)



(in thousands, except per share data)	First Quarter		Second Quarter		Third Quarter		Fourth Quarter
Net sales:
2019		$466,146		$515,648		$532,324		$541,529
2018		$404,410		$430,602		$465,825		$476,884
Gross profit:
2019		$182,237		$209,387		$212,831		$209,385
2018		$154,791		$167,857		$181,609		$186,458
Net income from consolidated operations:
2019		$88,026		$90,083		$89,059		$92,573
2018		$71,695		$66,011		$73,899		$74,081
Net income attributable to HEICO:
2019		$79,332		$81,782		$81,098		$85,684
2018		$65,152		$59,618		$67,086		$67,377
Net income per share attributable to HEICO:
Basic:
2019		$.60		$.61		$.61		$.64
2018		$.49		$.45		$.51		$.51
Diluted:
2019		$.58		$.60		$.59		$.62
2018		$.48		$.44		$.49		$.49

During the first quarter of fiscal 2019, the Company recognized a $16.6 million discrete tax benefit from stock option exercises, which, net of noncontrolling interests, increased net income attributable to HEICO by $15.1 million, or $.11 per basic and diluted share. During the first quarter of fiscal 2018, the Company recognized a net benefit from stock option exercises that increased net income attributable to HEICO by $2.1 million, or $.02 per basic and diluted share.

During the first quarter of fiscal 2018, the U.S. government enacted significant changes to existing tax law resulting in the Company recording a provisional discrete tax benefit from remeasuring its U.S. federal net deferred tax liabilities that was partially offset by a provisional discrete tax expense related to a one-time transition tax on the unremitted earnings of the Company's foreign subsidiaries. The net impact of these amounts increased net income attributable to HEICO by $11.9 million, or $.09 per basic and dilute share. See Note 7, Income Taxes, for additional information regarding changes to existing tax law.

Due to changes in the average number of common shares outstanding, net income per share attributable to HEICO for the full fiscal year may not equal the sum of the four individual quarters.

OPERATING SEGMENTS

12 Months Ended

Oct. 31, 2019

Segment Reporting [Abstract]

Segment Reporting Disclosure [Text Block]

OPERATING SEGMENTS

The Company has two operating segments: the Flight Support Group (“FSG”), consisting of HEICO Aerospace and HEICO Flight Support Corp. and their collective subsidiaries; and the Electronic Technologies Group (“ETG”), consisting of HEICO Electronic and its subsidiaries. The Company's operating segment reporting structure is consistent with how management reviews the business, makes investing and resource decisions and assesses operating performance. Additionally, characteristics such as similarity of products, customers, economic characteristics and various other factors are considered when identifying the Company's operating segments.

The FSG designs, manufactures, repairs, overhauls and distributes jet engine and aircraft component replacement parts. The parts and services are approved by the FAA. The FSG also manufactures and sells specialty parts as a subcontractor for aerospace and industrial original equipment manufacturers and the U.S. government. Additionally, the FSG is a leading supplier, distributor, and integrator of military aircraft parts and support services primarily to foreign military organizations allied with the U.S. and a leading manufacturer of advanced niche components and complex composite assemblies for commercial aviation, defense and space applications. Further, the FSG engineers, designs and manufactures thermal insulation blankets and parts as well as removable/reusable insulation systems for aerospace, defense, commercial and industrial applications, manufactures expanded foil mesh for lightning strike protection in fixed and rotary wing aircraft and is a distributor of aviation electrical interconnect products and electromechanical parts.

The ETG collectively designs, manufactures and sells various types of electronic, data and microwave, and electro-optical products including three-dimensional microelectronic and stacked memory products, high-speed interface products, high voltage interconnection devices, high voltage advanced power electronics products, power conversion products, underwater locator beacons, emergency locator transmission beacons, electromagnetic interference shielding, traveling wave tube amplifiers, harsh environment electronic connectors and other interconnect products, communications and electronic intercept receivers and tuners, crashworthy and ballistically self-sealing auxiliary fuel systems for military rotorcraft, radio frequency (RF) and microwave amplifiers, transmitters and receivers, satellite microwave modules and integrated subsystems, high performance active antenna systems for commercial aircraft, precision guided munitions, other defense applications and commercial uses, silicone material for a variety of demanding applications; precision power analog monolithic, hybrid and open frame components, high-reliability ceramic-to-metal feedthroughs and connectors, technical surveillance countermeasures equipment, nuclear radiation detectors and RF sources, detectors, and controllers.

The Company’s reportable operating segments offer distinctive products and services that are marketed through different channels. They are managed separately because of their unique technology and service requirements.

Segment Profit or Loss

The accounting policies of the Company’s operating segments are the same as those described in Note 1, Summary of Significant Accounting Policies. Management evaluates segment performance based on segment operating income.

Information on the Company’s two operating segments, the FSG and the ETG, for each of the last three fiscal years ended October 31 is as follows (in thousands):



	Segment				Other, Primarily Corporate and Intersegment ⁽¹⁾			Consolidated Totals
	FSG		ETG		Other, Primarily Corporate and Intersegment ⁽¹⁾			Consolidated Totals
Year ended October 31, 2019:
Net sales		$1,240,183		$834,522		($19,058	)		$2,055,647
Depreciation	13,793		10,957		1,008			25,758
Amortization	19,624		37,131		984			57,739
Operating income	242,029		245,743		(30,675		)	457,097
Capital expenditures	17,036		11,826		76			28,938

Year ended October 31, 2018:
Net sales		$1,097,937		$701,827		($22,043	)		$1,777,721
Depreciation	13,322		9,225		692			23,239
Amortization	19,530		33,339		1,083			53,952
Operating income	206,623		204,508		(34,886		)	376,245
Capital expenditures	13,074		9,531		19,266			41,871

Year ended October 31, 2017:
Net sales		$967,540		$574,261		($16,988	)		$1,524,813
Depreciation	13,042		8,609		227			21,878
Amortization	18,026		24,167		752			42,945
Operating income	179,278		157,451		(30,071		)	306,658
Capital expenditures	15,665		10,100		233			25,998

⁽¹⁾ Intersegment activity principally consists of net sales from the ETG to the FSG.

Total assets by operating segment are as follows (in thousands):



					Other, Primarily Corporate		Consolidated Totals
	Segment
As of October 31,	FSG		ETG
2019		$1,149,737		$1,643,032		$176,442		$2,969,211
2018	1,093,858		1,391,997		167,541		2,653,396

Major Customer and Geographic Information

The Company markets its products and services in approximately 110 countries. The following table summarizes the Company’s net sales to customers located in the United States and to those in other countries for each of the last three fiscal years ended October 31 (in thousands). Net sales are attributed to countries based on the location of the customer. Net sales to any one customer or originating from any one foreign country did not account for 10% or more of the Company’s consolidated net sales during any of the last three fiscal years. The following table also summarizes the Company’s long-lived assets held within and outside of the United States as of October 31 for each of the last three fiscal years (in thousands). Long-lived assets consist of net property, plant and equipment.



	2019		2018		2017
Net sales:
United States of America		$1,308,943		$1,127,998		$1,007,491
Other countries	746,704		649,723		517,322
Total net sales		$2,055,647		$1,777,721		$1,524,813

Long-lived assets:
United States of America		$143,350		$124,225		$97,367
Other countries	29,995		30,514		32,516
Total long-lived assets		$173,345		$154,739		$129,883

COMMITMENTS AND CONTINGENCIES

12 Months Ended

Oct. 31, 2019

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies Disclosure [Text Block]

COMMITMENTS AND CONTINGENCIES

Lease Commitments

The Company leases certain property and equipment, including manufacturing facilities and office equipment under operating leases. Some of these leases provide the Company with the option after the initial lease term either to purchase the property at the then fair market value or renew the lease at the then fair rental value. Generally, management expects that leases will be renewed or replaced by other leases in the normal course of business.

Future minimum payments under non-cancelable operating leases for the next five fiscal years and thereafter are estimated to be as follows (in thousands):



Year ending October 31,
2020		$15,508
2021	15,563
2022	13,808
2023	8,515
2024	4,741
Thereafter	18,812
Total minimum lease commitments		$76,947

Total rent expense charged to operations for operating leases in fiscal 2019, 2018 and 2017 amounted to $20.0 million, $17.5 million and $15.6 million, respectively.

Guarantees

As of October 31, 2019, the Company has arranged for standby letters of credit aggregating $4.1 million, which are supported by its revolving credit facility and pertain to payment guarantees related to potential workers' compensation claims and a facility lease as well as performance guarantees related to customer contracts entered into by certain of the Company's subsidiaries.

Product Warranty

Changes in the Company’s product warranty liability in fiscal 2019 and 2018 are as follows (in thousands):



	Year ended October 31,
	2019			2018
Balances as of beginning of year		$3,306			$2,921
Accruals for warranties	2,061			2,720
Acquired warranty liabilities	—			320
Warranty claims settled	(2,557		)	(2,655		)
Balances as of end of year		$2,810			$3,306

Litigation

The Company is involved in various legal actions arising in the normal course of business. Based upon the Company’s and its legal counsel’s evaluations of any claims or assessments, management is of the opinion that the outcome of these matters will not have a material adverse effect on the Company’s results of operations, financial position or cash flows.

SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION

12 Months Ended

Oct. 31, 2019

Supplemental Cash Flow Elements [Abstract]

Cash Flow, Supplemental Disclosures [Text Block]

SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION

The following table presents supplemental disclosures of cash flow information and non-cash investing activities for fiscal 2019, 2018 and 2017 (in thousands):



	Year ended October 31,
	2019			2018			2017
Cash paid for income taxes		$82,211			$90,488			$95,851
Cash received from income tax refunds	(578		)	(1,510		)	(2,953		)
Cash paid for interest	22,158			19,233			9,631
Contingent consideration	2,107			—			13,797
Additional purchase consideration	—			(407		)	220
Property, plant and equipment acquired through capital lease obligations	84			7,166			37

SUBSEQUENT EVENT (Notes)	12 Months Ended
SUBSEQUENT EVENT (Notes)	Oct. 31, 2019
Subsequent Events [Abstract]
Subsequent Events [Text Block]	SUBSEQUENT EVENT In December 2019, the Company, through HEICO Electronic, acquired 80.1% of the stock of Quell Corporation ("Quell"). Quell designs and manufactures electromagnetic interference (EMI)/radio-frequency interference (RFI) and transient protection solutions for a wide variety of connectors that principally serve customers within the aerospace and defense markets. The remaining 19.9% continues to be owned by certain members of Quell's management team. The purchase price of this acquisition was paid using cash provided by operating activities and the total consideration for the acquisition is not material or significant to the Company’s consolidated financial statements.

VALUATION AND QUALIFYING ACCOUNTS

12 Months Ended

Oct. 31, 2019

SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]

SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]

SCHEDULE II – VALUATION AND QUALIFYING ACCOUNTS



	Year ended October 31,
	2019			2018			2017
Allowance for doubtful accounts (in thousands):
Allowance as of beginning of year		$3,258			$3,006			$3,159
Additions charged to costs and expenses	638			492			7
Additions charged (credited) to other accounts^(a)	10			(13		)	298
Deductions ^(b)	(240		)	(227		)	(458		)
Allowance as of end of year		$3,666			$3,258			$3,006


(a)	Principally additions from acquisitions and foreign currency translation adjustments.


(b)	Principally write-offs of uncollectible accounts receivable.



	Year ended October 31,
	2019			2018			2017
Inventory valuation reserves (in thousands):
Reserves as of beginning of year		$95,391			$92,148			$81,449
Additions charged to costs and expenses	10,148			9,227			6,284
Additions charged to other accounts ^(a)	1,885			1,270			6,264
Deductions ^(b)	(3,603		)	(7,254		)	(1,849		)
Reserves as of end of year		$103,821			$95,391			$92,148


(a)	Principally additions from acquisitions and foreign currency translation adjustments.

(b)

Principally write-offs of slow-moving, obsolete or damaged inventory.

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)

12 Months Ended

Oct. 31, 2019

Accounting Policies [Abstract]

Nature Of Business, Policy [Policy Text Block]

Nature of Business

Basis Of Presentation, Policy [Policy Text Block]

Basis of Presentation

Use of Estimates and Assumptions, Policy [Policy Text Block]

Use of Estimates and Assumptions

Cash and Cash Equivalents, Policy [Policy Text Block]

Cash and Cash Equivalents

Accounts Receivable, Policy [Policy Text Block]

Accounts Receivable

Revenue from Contract with Customer [Policy Text Block]

Contract Assets

Concentrations Of Credit Risk, Policy [Policy Text Block]

Concentrations of Credit Risk

Inventory, Policy [Policy Text Block]

Inventory

Property, Plant and Equipment [Line Items]

Property, Plant and Equipment, Policy [Policy Text Block]

Property, Plant and Equipment

The costs of major additions and improvements are capitalized. Leasehold improvements are amortized over the shorter of the leasehold improvement’s useful life or the lease term.

Business Combinations, Policy [Policy Text Block]

Business Combinations

Goodwill and Other Intangible Assets, Policy [Policy Text Block]

Goodwill and Other Intangible Assets



Customer relationships	4	to	15	years
Intellectual property	4	to	22	years
Licenses	10	to	11	years
Patents	5	to	20	years
Trade names	8	to	15	years

Customer Rebates and Credits, Policy [Policy Text Block]

Customer Rebates and Credits

Product Warranties, Policy [Policy Text Block]

Product Warranties

Defined Benefit Pension Plan, Policy [Policy Text Block]

Defined Benefit Pension Plan



	As of October 31,
	2019			2018
Fair value of plan assets		$11,311			$10,379
Projected benefit obligation	13,943			12,890
Funded status		($2,632	)		($2,511	)

Revenue [Policy Text Block]

Revenue Recognition

Stock-Based Compensation, Policy [Policy Text Block]

Stock-Based Compensation

Income Taxes, Policy [Policy Text Block]

Income Taxes

Redeemable Noncontrolling Interests, Policy [Policy Text Block]

Redeemable Noncontrolling Interests

Net Income per Share Attributable to HEICO Shareholders, Policy [Policy Text Block]

Net Income per Share Attributable to HEICO Shareholders

Foreign Currency Translation, Policy [Policy Text Block]

Foreign Currency

Contingencies, Policy [Policy Text Block]

Contingencies

New Accounting Pronouncements, Policy [Policy Text Block]

New Accounting Pronouncements

The following table presents the cumulative effect of adopting ASC 606 on the Company's Consolidated Balance Sheet as of November 1, 2018 (in thousands):



	As Reported		Impact of			As Adjusted
	Under ASC 605		ASC 606			Under ASC 606
	October 31, 2018		Adoption			November 1, 2018
Assets
Contract assets		$14,183		$40,089			$54,272
Inventories, net	401,553		(29,412		)	372,141
Prepaid expenses and other current assets	21,187		(489		)	20,698

Liabilities
Accrued expenses and other current liabilities		$171,514		($8,588	)		$162,926
Deferred income taxes	46,644		4,258			50,902

Redeemable noncontrolling interests		$132,046		$819			$132,865

Shareholders' equity
Retained earnings		$1,091,183		$13,373			$1,104,556
Noncontrolling interests	104,757		326			105,083

The following table presents the impact of adopting ASC 606 on the Company's Consolidated Balance Sheet as of October 31, 2019 (in thousands):



	As of October 31, 2019
	As Reported		Effect of			As Adjusted
	Under ASC 606		ASC 606			Under ASC 605
Assets
Contract assets		$43,132		($39,638	)		$3,494
Inventories, net	420,319		28,079			448,398
Prepaid expenses and other current assets	18,953		116			19,069

Liabilities
Accrued expenses and other current liabilities		$178,957		$6,144			$185,101
Deferred income taxes	51,496		(3,978		)	47,518

Redeemable noncontrolling interests		$188,264		$—			$188,264

Shareholders' equity
Retained earnings		$1,397,327		($13,261	)		$1,384,066
Noncontrolling interests	28,118		(348		)	27,770

The impact of adopting ASC 606 on the Company's Consolidated Statement of Operations was not material for fiscal 2019.

non-lease components associated with a lease as a single lease component, if certain criteria are met, when determining the value of the ROU asset and lease liability.

Assets Held under Capital Leases [Member]

Property, Plant and Equipment [Line Items]

Property, Plant and Equipment, Policy [Policy Text Block]

Capital Leases

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

Oct. 31, 2019

Accounting Policies [Abstract]

Property, Plant and Equipment [Table Text Block]

The Company’s property, plant and equipment is generally depreciated over the following estimated useful lives:

Intangible Assets Useful Life [Table Text Block]

The Company’s intangible assets subject to amortization are amortized on the straight-line method (except for certain customer relationships amortized on an accelerated method) over the following estimated useful lives:



Customer relationships	4	to	15	years
Intellectual property	4	to	22	years
Licenses	10	to	11	years
Patents	5	to	20	years
Trade names	8	to	15	years

Defined Benefit Plans Disclosures [Table Text Block]

The following table presents the fair value of the Plan's assets and projected benefit obligation as of October 31, for each of the last two fiscal years (in thousands):



	As of October 31,
	2019			2018
Fair value of plan assets		$11,311			$10,379
Projected benefit obligation	13,943			12,890
Funded status		($2,632	)		($2,511	)

Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block]

The following table presents the cumulative effect of adopting ASC 606 on the Company's Consolidated Balance Sheet as of November 1, 2018 (in thousands):



	As Reported		Impact of			As Adjusted
	Under ASC 605		ASC 606			Under ASC 606
	October 31, 2018		Adoption			November 1, 2018
Assets
Contract assets		$14,183		$40,089			$54,272
Inventories, net	401,553		(29,412		)	372,141
Prepaid expenses and other current assets	21,187		(489		)	20,698

Liabilities
Accrued expenses and other current liabilities		$171,514		($8,588	)		$162,926
Deferred income taxes	46,644		4,258			50,902

Redeemable noncontrolling interests		$132,046		$819			$132,865

Shareholders' equity
Retained earnings		$1,091,183		$13,373			$1,104,556
Noncontrolling interests	104,757		326			105,083

Schedule of Prospective Adoption of New Accounting Pronouncements [Table Text Block]

The following table presents the impact of adopting ASC 606 on the Company's Consolidated Balance Sheet as of October 31, 2019 (in thousands):



	As of October 31, 2019
	As Reported		Effect of			As Adjusted
	Under ASC 606		ASC 606			Under ASC 605
Assets
Contract assets		$43,132		($39,638	)		$3,494
Inventories, net	420,319		28,079			448,398
Prepaid expenses and other current assets	18,953		116			19,069

Liabilities
Accrued expenses and other current liabilities		$178,957		$6,144			$185,101
Deferred income taxes	51,496		(3,978		)	47,518

Redeemable noncontrolling interests		$188,264		$—			$188,264

Shareholders' equity
Retained earnings		$1,397,327		($13,261	)		$1,384,066
Noncontrolling interests	28,118		(348		)	27,770

ACQUISITIONS (Tables)

12 Months Ended

Oct. 31, 2019

Other Acquisitions [Member]

Business Acquisition [Line Items]

Schedule of Fair Value of Total Consideration [Table Text Block]

The following table summarizes the aggregate total consideration for the Company's other acquisitions (in thousands):



	Year ended October 31,
	2019			2018			2017
Cash paid		$243,550			$61,931			$109,346
Less: cash acquired	(2,466		)	(4,000		)	(7,713		)
Cash paid, net	241,084			57,931			101,633
Contingent consideration	2,107			—			—
Fair value of existing equity interest	1,417			—			—
Additional purchase consideration	—			(243		)	1,300
Total consideration		$244,608			$57,688			$102,933

Schedule of Purchase Price Allocation [Table Text Block]



	Year ended October 31,
	2019		2018		2017
Assets acquired:
Goodwill		$156,177		$38,359		$49,932
Customer relationships	47,553		11,620		29,500
Intellectual property	31,459		6,970		1,950
Trade names	19,216		760		16,750
Property, plant and equipment	18,013		1,777		4,522
Inventories	17,676		6,307		28,410
Accounts receivable	8,673		1,480		15,165
Other assets (including contract assets)	907		126		982
Total assets acquired, excluding cash	299,674		67,399		147,211

Liabilities assumed:
Deferred income taxes	7,455		—		5,432
Accrued expenses	2,937		1,522		6,054
Accounts payable	2,879		671		7,696
Other liabilities	548		—		1,434
Total liabilities assumed	13,819		2,193		20,616

Noncontrolling interests in consolidated subsidiaries	41,247		7,518		23,662

Net assets acquired, excluding cash		$244,608		$57,688		$102,933

Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block]



	Year ended October 31,
	2019	2018	2017
Customer relationships	11	7	12
Intellectual property	15	10	13

HEICO Electronic [Member] | AAT [Member]

Business Acquisition [Line Items]

Schedule of Fair Value of Total Consideration [Table Text Block]

The following table summarizes the total consideration for the acquisition of AAT (in thousands):



Cash paid		$317,500
Less: cash acquired	(868		)
Cash paid, net	316,632
Contingent consideration	13,797
Additional purchase consideration	544
Total consideration		$330,973

Schedule of Purchase Price Allocation [Table Text Block]



Assets acquired:
Goodwill		$157,901
Customer relationships	100,000
Intellectual property	39,000
Trade name	20,000
Inventories	8,306
Accounts receivable	6,115
Property, plant and equipment	1,893
Other assets	208
Total assets acquired, excluding cash	333,423

Liabilities assumed:
Accounts payable	1,299
Accrued expenses	1,151
Total liabilities assumed	2,450
Net assets acquired, excluding cash		$330,973

Schedule of Pro Forma Information [Table Text Block]

The following table presents unaudited pro forma financial information for fiscal 2017 as if the acquisition of AAT had occurred as of November 1, 2015 (in thousands, except per share data):



	Year ended
	October 31, 2017
Net sales		$1,582,653
Net income from consolidated operations		$220,419
Net income attributable to HEICO		$198,744
Net income per share attributable to HEICO shareholders:
Basic		$1.51
Diluted		$1.47

SELECTED FINANCIAL STATEMENT INFORMATION (Tables)

12 Months Ended

Oct. 31, 2019

Selected Financial Statement Information [Abstract]

Schedule of Accounts Receivable [Table Text Block]

Accounts Receivable



	As of October 31,
(in thousands)	2019			2018
Accounts receivable		$277,992			$240,544
Less: Allowance for doubtful accounts	(3,666		)	(3,258		)
Accounts receivable, net		$274,326			$237,286

Schedule of Inventory [Table Text Block]

Inventories



	As of October 31,
(in thousands)	2019		2018
Finished products		$199,880		$192,758
Work in process	32,548		49,315
Materials, parts, assemblies and supplies	187,891		158,039
Contracts in process	—		1,649
Less: Billings to date	—		(208		)
Inventories, net of valuation reserves		$420,319		$401,553

Property, Plant and Equipment [Table Text Block]

Property, Plant and Equipment



	As of October 31,
(in thousands)	2019			2018
Land		$6,820			$5,864
Buildings and improvements	116,997			101,424
Machinery, equipment and tooling	253,127			230,108
Construction in progress	8,382			5,044
	385,326			342,440
Less: Accumulated depreciation and amortization	(211,981		)	(187,701		)
Property, plant and equipment, net		$173,345			$154,739

Schedule Of Accrued Expenses and Other Current Liabilities [Table Text Block]

Accrued Expenses and Other Current Liabilities



	As of October 31,
(in thousands)	2019		2018
Accrued employee compensation and related payroll taxes		$112,602		$97,048
Contract liabilities	23,809		28,262
Accrued customer rebates and credits	17,978		16,861
Contingent consideration and other accrued purchase consideration	497		6,138
Other	24,071		23,205
Accrued expenses and other current liabilities		$178,957		$171,514

Schedule of Research and Development Expenses [Table Text Block]

The amount of new product research and development ("R&D") expenses included in cost of sales is as follows (in thousands):



	Year ended October 31,
	2019		2018		2017
R&D expenses		$66,630		$57,450		$46,473

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

Changes in the components of accumulated other comprehensive loss during fiscal 2019 and 2018 are as follows (in thousands):



	Foreign Currency Translation			Defined Benefit Pension Plan			Accumulated Other Comprehensive Loss
Balances as of October 31, 2017		($9,533	)		($1,023	)		($10,556	)
Unrealized (loss) gain	(4,837		)	124			(4,713		)
Amortization of unrealized loss	—			13			13
Balances as of October 31, 2018	(14,370		)	(886		)	(15,256		)
Unrealized loss	(619		)	(889		)	(1,508		)
Amortization of unrealized loss	—			25			25
Balances as of October 31, 2019		($14,989	)		($1,750	)		($16,739	)

GOODWILL AND OTHER INTANGIBLE ASSETS (Tables)

12 Months Ended

Oct. 31, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill [Table Text Block]

Changes in the carrying amount of goodwill during fiscal 2019 and 2018 by operating segment are as follows (in thousands):



	Segment						Consolidated
	FSG			ETG			Totals
Balances as of October 31, 2017		$388,606			$692,700			$1,081,306
Goodwill acquired	10,586			27,734			38,320
Adjustments to goodwill	972			(3,003		)	(2,031		)
Foreign currency translation adjustments	(1,470		)	(1,293		)	(2,763		)
Balances as of October 31, 2018	398,694			716,138			1,114,832
Goodwill acquired	12,891			143,286			156,177
Foreign currency translation adjustments	(1,580		)	(765		)	(2,345		)
Adjustments to goodwill	39			—			39
Balances as of October 31, 2019		$410,044			$858,659			$1,268,703

Schedule Of Identifiable Intangible Assets [Table Text Block]

Identifiable intangible assets consist of the following (in thousands):



	As of October 31, 2019							As of October 31, 2018
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Amortizing Assets:
Customer relationships		$411,076		($162,722	)		$248,354		$373,946		($135,359	)		$238,587
Intellectual property	216,359		(70,169		)	146,190		185,983		(56,055		)	129,928
Licenses	6,559		(4,102		)	2,457		6,559		(3,522		)	3,037
Patents	986		(666		)	320		927		(609		)	318
Non-compete agreements	813		(813		)	—		814		(814		)	—
Trade names	450		(180		)	270		466		(157		)	309
	636,243		(238,652		)	397,591		568,695		(196,516		)	372,179
Non-Amortizing Assets:
Trade names	153,102		—			153,102		134,181		—			134,181
		$789,345		($238,652	)		$550,693		$702,876		($196,516	)		$506,360

LONG-TERM DEBT (Tables)

12 Months Ended

Oct. 31, 2019

Debt Disclosure [Abstract]

Schedule of Long-term Debt Instruments [Table Text Block]

Long-term debt consists of the following (in thousands):



	As of October 31,
	2019			2018
Borrowings under revolving credit facility		$553,000			$523,000
Capital leases and note payable	8,955			9,470
	561,955			532,470
Less: Current maturities of long-term debt	(906		)	(859		)
		$561,049			$531,611

Schedule of Future Minimum Lease Payments for Capital Leases [Table Text Block]

The estimated future minimum lease payments of all capital leases for the next five fiscal years and thereafter are as follows (in thousands):



Year ending October 31,
2020		$1,213
2021	1,212
2022	1,203
2023	906
2024	832
Thereafter	5,596
Total minimum lease payments	10,962
Less: amount representing interest	(2,327		)
Present value of minimum lease payments		$8,635

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

+ References

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+ Details

REVENUE (Tables)

12 Months Ended

Oct. 31, 2019

Revenue from Contract with Customer [Abstract]

Contract with Customer, Asset and Liability [Table Text Block]

Changes in the Company’s contract assets and liabilities during fiscal 2019 are as follows (in thousands):



	October 31, 2019		November 1, 2018		Change

Contract assets		$43,132		$54,272		($11,140	)
Contract liabilities	23,809		19,674		4,135
Net contract assets		$19,323		$34,598		($15,275	)

Product Line [Member]

Disaggregation of Revenue [Line Items]

Disaggregation of Revenue [Table Text Block]

The following table summarizes the Company’s net sales by product line for each operating segment (in thousands):



	Year Ended October 31,
	2019			2018			2017
Flight Support Group:
Aftermarket replacement parts ⁽¹⁾		$678,001			$582,562			$489,644
Repair and overhaul parts and services ⁽²⁾	299,323			286,454			270,482
Specialty products ⁽³⁾	262,859			228,921			207,414
Total net sales	1,240,183			1,097,937			967,540

Electronic Technologies Group:
Electronic component parts for defense, space and aerospace equipment ⁽⁴⁾	633,685			547,088			420,991
Electronic component parts for equipment in various other industries ⁽⁵⁾	200,837			154,739			153,270
Total net sales	834,522			701,827			574,261

Intersegment sales	(19,058		)	(22,043		)	(16,988		)

Total consolidated net sales		$2,055,647			$1,777,721			$1,524,813


⁽¹⁾	Includes various jet engine and aircraft component replacement parts.


⁽²⁾	Includes primarily the sale of parts consumed in various repair and overhaul services on selected jet engine and aircraft components, avionics, instruments, composites and flight surfaces of commercial and military aircraft.


⁽³⁾	Includes primarily the sale of specialty components such as thermal insulation blankets, renewable/reusable insulation systems, advanced niche components, complex composite assemblies, and expanded foil mesh.

⁽⁴⁾

⁽⁵⁾

Includes various component parts such as electromagnetic and radio interference shielding, high voltage interconnection devices, high voltage advanced power electronics, harsh environment connectivity products, custom molded cable assemblies, and silicone material for a variety of demanding applications.

Sales by Industry [Member]

Disaggregation of Revenue [Line Items]

Disaggregation of Revenue [Table Text Block]

The following table summarizes the Company’s net sales by industry for each operating segment (in thousands):



	Year ended October 31,
	2019			2018			2017
Flight Support Group:
Aerospace		$1,004,088			$890,059			$781,344
Defense and Space	190,076			163,330			146,708
Other ⁽¹⁾	46,019			44,548			39,488
Total net sales	1,240,183			1,097,937			967,540

Electronic Technologies Group:
Defense and Space	531,029			452,714			368,234
Other ⁽²⁾	217,889			177,878			157,195
Aerospace	85,604			71,235			48,832
Total net sales	834,522			701,827			574,261

Other, primarily corporate and intersegment	(19,058		)	(22,043		)	(16,988		)

Total consolidated net sales		$2,055,647			$1,777,721			$1,524,813


⁽¹⁾	Principally industrial products.

⁽²⁾

Principally other electronics and medical products.

FAIR VALUE MEASUREMENTS (Tables)

12 Months Ended

Oct. 31, 2019

Fair Value Disclosures [Abstract]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

The Company's assets and liabilities that were measured at fair value on a recurring basis are set forth by level within the fair value hierarchy in the following tables (in thousands):



	As of October 31, 2019
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
Assets:
Deferred compensation plan:
Corporate-owned life insurance		$—		$151,871		$—		$151,871
Money market funds	20		—		—		20
Total assets		$20		$151,871		$—		$151,891

Liabilities:
Contingent consideration		$—		$—		$18,326		$18,326



	As of October 31, 2018
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
Assets:
Deferred compensation plans:
Corporate-owned life insurance		$—		$123,255		$—		$123,255
Money market funds	3,560		—		—		3,560
Equity securities	3,179		—		—		3,179
Mutual funds	1,437		—		—		1,437
Other	1,306		—		—		1,306
Total assets		$9,482		$123,255		$—		$132,737

Liabilities:
Contingent consideration		$—		$—		$20,875		$20,875

Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]

The Level 3 inputs used to derive the estimated fair value of the Company's contingent consideration liability as of October 31, 2019 are as follows:



	Fiscal 2019 Acquisition			Fiscal 2017 Acquisition			Fiscal 2016 Acquisition
Compound annual revenue growth rate range	(7%)	-	9%	(3%)	-	10%	(11	%)	-	3%
Weighted average discount rate	5.7%			4.6%			3.0%

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]



	Liabilities
Balance as of October 31, 2017		$27,573
Payment of contingent consideration	(5,425		)
Decrease in accrued contingent consideration, net	(1,365		)
Foreign currency transaction adjustments	92
Balance as of October 31, 2018	20,875
Increase in accrued contingent consideration, net	2,630
Contingent consideration related to acquisition	2,107
Payment of contingent consideration	(7,178		)
Foreign currency transaction adjustments	(108		)
Balance as of October 31, 2019		$18,326

Included in the accompanying Consolidated Balance Sheet under the following captions:
Accrued expenses and other current liabilities		$497
Other long-term liabilities	17,829
		$18,326

INCOME TAXES (Tables)

12 Months Ended

Oct. 31, 2019

Income Tax Disclosure [Abstract]

Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]

The components of income before income taxes and noncontrolling interests are as follows (in thousands):



	Year ended October 31,
	2019		2018		2017
Domestic		$386,584		$309,123		$264,420
Foreign	51,257		47,163		33,540
Income before taxes and noncontrolling interests		$437,841		$356,286		$297,960

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

The components of the provision for income taxes on income before income taxes and noncontrolling interests are as follows (in thousands):



	Year ended October 31,
	2019			2018			2017
Current:
Federal		$56,670			$61,548			$85,047
State	12,795			9,420			6,820
Foreign	15,027			12,608			9,529
	84,492			83,576			101,396
Deferred:
Federal	(3,140		)	(13,115		)	(9,661		)
State	(1,263		)	1,578			(499		)
Foreign	(1,989		)	(1,439		)	(936		)
	(6,392		)	(12,976		)	(11,096		)
Total income tax expense		$78,100			$70,600			$90,300

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

A reconciliation of the federal statutory income tax rate to the Company’s effective tax rate is as follows:



	Year ended October 31,
	2019		2018		2017
Federal statutory income tax rate (blended rate in fiscal 2018)	21.0	%	23.3	%	35.0	%
State taxes, net of federal income tax benefit	3.0	%	2.9	%	1.9	%
Tax benefit related to stock option exercises	(3.8	%)	(.5	%)	(1.0	%)
Discrete net tax benefit related to Tax Act	—	%	(3.4	%)	—	%
Research and development tax credits	(1.7	%)	(2.0	%)	(1.8	%)
Foreign derived intangible income deduction	(1.4	%)	—	%	—	%
Tax-exempt (gains) losses on corporate-owned life insurance policies	(.6	%)	.1	%	(1.8	%)
Nondeductible compensation	.8	%	.2	%	—	%
Domestic production activities tax deduction	—	%	(.8	%)	(1.1	%)
Other, net	.5	%	—	%	(.9	%)
Effective tax rate	17.8	%	19.8	%	30.3	%

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

Significant components of the Company’s deferred tax assets and liabilities are as follows (in thousands):



	As of October 31,
	2019			2018
Deferred tax assets:
Deferred compensation liability		$35,437			$31,152
Inventories	23,858			22,204
Share-based compensation	10,206			9,811
Bonus accrual	6,463			4,474
Customer rebates accrual	2,324			1,526
Vacation accrual	1,452			1,456
Other	8,806			7,152
Total deferred tax assets	88,546			77,775

Deferred tax liabilities:
Goodwill and other intangible assets	(122,075		)	(112,533		)
Property, plant and equipment	(14,137		)	(11,615		)
Adoption of ASC 606	(3,277		)	—
Other	(553		)	(271		)
Total deferred tax liabilities	(140,042		)	(124,419		)
Net deferred tax liability		($51,496	)		($46,644	)

Summary of Income Tax Contingencies [Table Text Block]

A reconciliation of the activity related to the liability for gross unrecognized tax benefits during fiscal 2019 and 2018 is as follows (in thousands):



	Year ended October 31,
	2019			2018
Balances as of beginning of year		$2,100			$2,040
Increases related to current year tax positions	653			591
Increases related to prior year tax positions	45			20
Settlements	—			(394		)
Lapses of statutes of limitations	(128		)	(157		)
Balances as of end of year		$2,670			$2,100

SHARE-BASED COMPENSATION (Tables)

12 Months Ended

Oct. 31, 2019

Share-based Payment Arrangement [Abstract]

Schedule Of Share Based Compensation Stock Options Activity And Shares Available For Grants [Table Text Block]

Information concerning share-based activity for each of the last three fiscal years ended October 31 is as follows (in thousands, except per share data):



			Shares Under Option
	Shares Available For Grant		Shares		Weighted Average Exercise Price
Outstanding as of October 31, 2016	2,016		6,520			$14.23
Granted	(1,186	)	1,186			$41.37
Exercised	—		(409	)		$15.27
Outstanding as of October 31, 2017	830		7,297			$18.58
Shares approved by the Company's shareholders for the 2018 Incentive Compensation Plan	5,000		—			$—
Cancelled unissued shares under the 2012 Incentive Compensation Plan	(830	)	—			$—
Granted	(412	)	412			$65.64
Exercised	—		(1,285	)		$10.54
Cancelled	24		(24	)		$28.85
Outstanding as of October 31, 2018	4,612		6,400			$23.19
Granted	(538	)	538			$73.30
Exercised	—		(2,235	)		$12.98
Cancelled	11		(11	)		$49.79
Outstanding as of October 31, 2019	4,085		4,692			$33.73

Share-based Compensation Arrangements by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding [Table Text Block]



	Options Outstanding
	Number Outstanding	Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (Years)	Aggregate Intrinsic Value
Common Stock	1,682		$35.91	5.6		$147,012
Class A Common Stock	3,010		$32.52	5.8	188,927
	4,692		$33.73	5.7		$335,939



	Options Exercisable
	Number Outstanding	Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (Years)	Aggregate Intrinsic Value
Common Stock	1,030		$22.81	4.2		$103,538
Class A Common Stock	1,755		$20.85	4.2	130,618
	2,785		$21.57	4.2		$234,156

Schedule of Cash Proceeds Received from Share-based Payment Awards [Table Text Block] (Deprecated 2017-01-31)

Information concerning stock options exercised is as follows (in thousands):



	Year ended October 31,
	2019		2018		2017
Cash proceeds from stock option exercises		$8,547		$4,031		$5,659
Tax benefit realized from stock option exercises	16,490		2,162		3,087
Intrinsic value of stock option exercises	204,901		75,152		10,376

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]



	Year ended October 31,
	2019				2018				2017
	Common Stock		Class A Common Stock		Common Stock		Class A Common Stock		Common Stock		Class A Common Stock
Expected stock price volatility	28.52	%	24.81	%	31.00	%	27.69	%	37.89	%	28.18	%
Risk-free interest rate	2.52	%	2.69	%	2.83	%	2.81	%	2.44	%	2.06	%
Dividend yield	.22	%	.22	%	.24	%	.29	%	.26	%	.31	%
Forfeiture rate	.00	%	.00	%	.00	%	.00	%	.00	%	.00	%
Expected option life (years)	8		6		9		8		9		7
Weighted average fair value	$33.88		$19.64		$30.00		$20.93		$21.36		$12.47

EMPLOYEE RETIREMENT PLANS EMPLOYEE RETIREMENT PLANS (Tables)

12 Months Ended

Oct. 31, 2019

Retirement Benefits [Abstract]

Schedule of Other Share-based Compensation, Activity [Table Text Block]

Information concerning share-based activity pertaining to the 401(k) Plan for each of the last three fiscal years ended October 31 is as follows (in thousands):



	Common Stock		Class A Common Stock
Shares available for issuance as of October 31, 2016	491		491
Issuance of common stock to the 401(k) Plan	(93	)	(93	)
Shares available for issuance as of October 31, 2017	398		398
Issuance of common stock to the 401(k) Plan	(65	)	(65	)
Shares available for issuance as of October 31, 2018	333		333
Issuance of common stock to the 401(k) Plan	(53	)	(53	)
Shares available for issuance as of October 31, 2019	280		280

REDEEMABLE NONCONTROLLING INTERESTS (Tables)

12 Months Ended

Oct. 31, 2019

Temporary Equity Disclosure [Abstract]

Redeemable Noncontrolling Interest [Table Text Block]

Management's estimate of the aggregate Redemption Amount of all Put Rights that the Company could be required to pay is as follows (in thousands):



	As of October 31,
	2019		2018
Redeemable at fair value		$136,611		$83,524
Redeemable based on a multiple of future earnings	51,653		48,522
Redeemable noncontrolling interests		$188,264		$132,046

Schedule of Put Rights [Table Text Block]

A summary of the Put Rights associated with the redeemable noncontrolling interests in certain of the Company’s subsidiaries as of October 31, 2019 is as follows:



Subsidiary Acquisition Year	Operating Segment	Company Ownership Interest	Earliest Put Right Year	Purchase Period (Years)
2005	ETG	95.9%	2020 ⁽¹⁾	4 ⁽²⁾
2006	FSG	80.1%	2020 ⁽¹⁾	4
2008	FSG	82.3%	2020 ⁽¹⁾	5
2009	ETG	82.5%	2020 ⁽¹⁾	1
2012	ETG	78.0%	2020 ⁽¹⁾	2
2012	FSG	84.0%	2020 ⁽¹⁾	4
2012	FSG	80.1%	2020 ⁽¹⁾	4
2015	FSG	80.0%	2020 ⁽¹⁾	4
2015	FSG	80.1%	2020	4
2015	ETG	80.1%	2020	2
2015	FSG	80.1%	2022	4
2017	FSG	80.1%	2022	2 ⁽³⁾
2018	ETG	85.0%	2021	1
2019	ETG	92.7%	2023	4
2019	ETG	85.0%	2024	4
2019	FSG	80.1%	2026	4
2019	ETG	75.0%	2024	4


⁽¹⁾Currently puttable
⁽²⁾A portion is to be purchased in a lump sum
⁽³⁾ The second purchase is to be made two years after the first Put Right Year

NET INCOME PER SHARE ATTRIBUTABLE TO HEICO SHAREHOLDERS (Tables)

12 Months Ended

Oct. 31, 2019

Earnings Per Share [Abstract]

Schedule of Calculation of Numerator and Denominator in Earnings Per Share [Table Text Block]

The computation of basic and diluted net income per share attributable to HEICO shareholders is as follows (in thousands, except per share data):



	Year ended October 31,
	2019		2018		2017
Numerator:
Net income attributable to HEICO		$327,896		$259,233		$185,985

Denominator:
Weighted average common shares outstanding - basic	133,640		132,543		131,703
Effect of dilutive stock options	3,710		4,153		3,885
Weighted average common shares outstanding - diluted	137,350		136,696		135,588

Net income per share attributable to HEICO shareholders:
Basic		$2.45		$1.96		$1.41
Diluted		$2.39		$1.90		$1.37

Anti-dilutive stock options excluded	330		512		799

QUARTERLY FINANCIAL INFORMATION (UNAUDITED) (Tables)

12 Months Ended

Oct. 31, 2019

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information [Table Text Block]

QUARTERLY FINANCIAL INFORMATION (UNAUDITED)



(in thousands, except per share data)	First Quarter		Second Quarter		Third Quarter		Fourth Quarter
Net sales:
2019		$466,146		$515,648		$532,324		$541,529
2018		$404,410		$430,602		$465,825		$476,884
Gross profit:
2019		$182,237		$209,387		$212,831		$209,385
2018		$154,791		$167,857		$181,609		$186,458
Net income from consolidated operations:
2019		$88,026		$90,083		$89,059		$92,573
2018		$71,695		$66,011		$73,899		$74,081
Net income attributable to HEICO:
2019		$79,332		$81,782		$81,098		$85,684
2018		$65,152		$59,618		$67,086		$67,377
Net income per share attributable to HEICO:
Basic:
2019		$.60		$.61		$.61		$.64
2018		$.49		$.45		$.51		$.51
Diluted:
2019		$.58		$.60		$.59		$.62
2018		$.48		$.44		$.49		$.49

OPERATING SEGMENTS (Tables)

12 Months Ended

Oct. 31, 2019

Segment Reporting [Abstract]

Schedule of Segment Reporting Information by Segment [Table Text Block]

Information on the Company’s two operating segments, the FSG and the ETG, for each of the last three fiscal years ended October 31 is as follows (in thousands):



	Segment				Other, Primarily Corporate and Intersegment ⁽¹⁾			Consolidated Totals
	FSG		ETG		Other, Primarily Corporate and Intersegment ⁽¹⁾			Consolidated Totals
Year ended October 31, 2019:
Net sales		$1,240,183		$834,522		($19,058	)		$2,055,647
Depreciation	13,793		10,957		1,008			25,758
Amortization	19,624		37,131		984			57,739
Operating income	242,029		245,743		(30,675		)	457,097
Capital expenditures	17,036		11,826		76			28,938

Year ended October 31, 2018:
Net sales		$1,097,937		$701,827		($22,043	)		$1,777,721
Depreciation	13,322		9,225		692			23,239
Amortization	19,530		33,339		1,083			53,952
Operating income	206,623		204,508		(34,886		)	376,245
Capital expenditures	13,074		9,531		19,266			41,871

Year ended October 31, 2017:
Net sales		$967,540		$574,261		($16,988	)		$1,524,813
Depreciation	13,042		8,609		227			21,878
Amortization	18,026		24,167		752			42,945
Operating income	179,278		157,451		(30,071		)	306,658
Capital expenditures	15,665		10,100		233			25,998

⁽¹⁾ Intersegment activity principally consists of net sales from the ETG to the FSG.

Reconciliation of Assets from Segment to Consolidated [Table Text Block]

Total assets by operating segment are as follows (in thousands):



					Other, Primarily Corporate		Consolidated Totals
	Segment
As of October 31,	FSG		ETG
2019		$1,149,737		$1,643,032		$176,442		$2,969,211
2018	1,093,858		1,391,997		167,541		2,653,396

Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]

The following table also summarizes the Company’s long-lived assets held within and outside of the United States as of October 31 for each of the last three fiscal years (in thousands). Long-lived assets consist of net property, plant and equipment.



	2019		2018		2017
Net sales:
United States of America		$1,308,943		$1,127,998		$1,007,491
Other countries	746,704		649,723		517,322
Total net sales		$2,055,647		$1,777,721		$1,524,813

Long-lived assets:
United States of America		$143,350		$124,225		$97,367
Other countries	29,995		30,514		32,516
Total long-lived assets		$173,345		$154,739		$129,883

COMMITMENTS AND CONTINGENCIES (Tables)

12 Months Ended

Oct. 31, 2019

Commitments and Contingencies Disclosure [Abstract]

Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]

Future minimum payments under non-cancelable operating leases for the next five fiscal years and thereafter are estimated to be as follows (in thousands):



Year ending October 31,
2020		$15,508
2021	15,563
2022	13,808
2023	8,515
2024	4,741
Thereafter	18,812
Total minimum lease commitments		$76,947

Schedule of Product Warranty Liability [Table Text Block]

Changes in the Company’s product warranty liability in fiscal 2019 and 2018 are as follows (in thousands):



	Year ended October 31,
	2019			2018
Balances as of beginning of year		$3,306			$2,921
Accruals for warranties	2,061			2,720
Acquired warranty liabilities	—			320
Warranty claims settled	(2,557		)	(2,655		)
Balances as of end of year		$2,810			$3,306

SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION (Tables)

12 Months Ended

Oct. 31, 2019

Supplemental Cash Flow Elements [Abstract]

Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]

The following table presents supplemental disclosures of cash flow information and non-cash investing activities for fiscal 2019, 2018 and 2017 (in thousands):



	Year ended October 31,
	2019			2018			2017
Cash paid for income taxes		$82,211			$90,488			$95,851
Cash received from income tax refunds	(578		)	(1,510		)	(2,953		)
Cash paid for interest	22,158			19,233			9,631
Contingent consideration	2,107			—			13,797
Additional purchase consideration	—			(407		)	220
Property, plant and equipment acquired through capital lease obligations	84			7,166			37

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Property, Plant and Equipment Useful Life) (Details)	12 Months Ended
	Oct. 31, 2019
Building and Building Improvements [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	10 years
Building and Building Improvements [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	40 years
Other Machinery and Equipment [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Other Machinery and Equipment [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	10 years
Leasehold Improvements [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	2 years
Leasehold Improvements [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	20 years
Tooling [Member] \| Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	2 years
Tooling [Member] \| Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	5 years

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Finite-Lived Intangible Asset Useful Life) (Details)	12 Months Ended
	Oct. 31, 2019
Customer Relationships [Member] \| Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	4 years
Customer Relationships [Member] \| Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	15 years
Intellectual Property [Member] \| Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	4 years
Intellectual Property [Member] \| Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	22 years
Licensing Agreements [Member] \| Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	10 years
Licensing Agreements [Member] \| Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	11 years
Patents [Member] \| Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	5 years
Patents [Member] \| Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	20 years
Trade Names [Member] \| Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	8 years
Trade Names [Member] \| Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	15 years

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Pension Plan Funded Status) (Details) - Pension Plan [Member] - USD ($) $ in Thousands	Oct. 31, 2019	Oct. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 11,311	$ 10,379
Defined Benefit Plan, Benefit Obligation	13,943	12,890
Defined Benefit Plan, Funded (Unfunded) Status of Plan	$ (2,632)	$ (2,511)

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Cumulative Effect of Adopting) (Details) - USD ($) $ in Thousands	Oct. 31, 2019	Nov. 01, 2018	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Contract assets	$ 43,132	$ 54,272	$ 14,183
Inventory, Net	420,319	372,141	401,553
Prepaid expenses and other current assets	18,953	20,698	21,187
Accrued expenses and other current liabilities	178,957	162,926	171,514
Deferred income taxes	51,496	50,902	46,644
Redeemable noncontrolling interests	188,264	132,865	132,046	$ 131,123	$ 99,512
Retained earnings	1,397,327	1,104,556	1,091,183
Noncontrolling interests	$ 28,118	105,083	$ 104,757
Accounting Standards Update 2014-09 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Contract assets		40,089
Inventory, Net		(29,412)
Prepaid expenses and other current assets		(489)
Accrued expenses and other current liabilities		(8,588)
Deferred income taxes		4,258
Redeemable noncontrolling interests		819
Retained earnings		13,373
Noncontrolling interests		$ 326

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Impact of Adopting ASC 606) (Details) - USD ($) $ in Thousands	Oct. 31, 2019	Nov. 01, 2018	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Item Effected [Line Items]
Contract assets	$ 43,132	$ 54,272	$ 14,183
Inventory, Net	420,319	372,141	401,553
Prepaid expenses and other current assets	18,953	20,698	21,187
Accrued expenses and other current liabilities	178,957	162,926	171,514
Deferred income taxes	51,496	50,902	46,644
Redeemable noncontrolling interests	188,264	132,865	132,046	$ 131,123	$ 99,512
Retained earnings	1,397,327	1,104,556	1,091,183
Noncontrolling interests	28,118	$ 105,083	$ 104,757
Accounting Standards Update 2014-09 [Member]
Item Effected [Line Items]
Contract assets	(39,638)
Inventory, Net	28,079
Prepaid expenses and other current assets	116
Accrued expenses and other current liabilities	6,144
Deferred income taxes	(3,978)
Redeemable noncontrolling interests	0
Retained earnings	(13,261)
Noncontrolling interests	(348)
Previous Accounting Guidance [Member]
Item Effected [Line Items]
Contract assets	3,494
Inventory, Net	448,398
Prepaid expenses and other current assets	19,069
Accrued expenses and other current liabilities	185,101
Deferred income taxes	47,518
Redeemable noncontrolling interests	188,264
Retained earnings	1,384,066
Noncontrolling interests	$ 27,770

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details Textuals) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2019	Jul. 31, 2019
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment, Depreciation Methods	Depreciation and amortization is generally provided on the straight-line method over the estimated useful lives of the various assets.
Business Combination, Description [Abstract]
Business Acquisition, Transaction Costs	$ 3.2
Goodwill and Intangible Assets Disclosure [Abstract]
Finite-Lived Intangible Assets, Amortization Method	The Company’s intangible assets subject to amortization are amortized on the straight-line method (except for certain customer relationships amortized on an accelerated method) over the following estimated useful lives
Minimum [Member] \| Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Operating Lease, Right-of-Use Asset	$ 60.0
Operating Lease, Liability	60.0
Maximum [Member] \| Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Operating Lease, Right-of-Use Asset	75.0
Operating Lease, Liability	$ 70.0
HEICO Aerospace [Member]
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Percentage of interest owned by noncontrolling shareholders		20.00%
Noncontrolling Interest, Ownership Percentage by Parent		80.00%
Lufthansa Technik Ag [Member] \| HEICO Aerospace [Member]
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Percentage of interest owned by noncontrolling shareholders	20.00%
Heico Flight Support Corp [Member] \| Subsidiary One [Member]
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Noncontrolling Interest, Ownership Percentage by Parent	80.00%
Heico Flight Support Corp [Member] \| Subsidiary Two [Member]
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Noncontrolling Interest, Ownership Percentage by Parent	82.30%
Heico Flight Support Corp [Member] \| Subsidiary Three [Member]
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Noncontrolling Interest, Ownership Percentage by Parent	84.00%
Heico Flight Support Corp [Member] \| Certain Subsidiaries [Member]
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Noncontrolling Interest, Ownership Percentage by Parent	80.10%
HEICO Aerospace [Member] \| Joint Venture [Member]
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Noncontrolling Interest, Ownership Percentage by Parent	84.00%
HEICO Electronic [Member] \| Subsidiary Four [Member]
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Noncontrolling Interest, Ownership Percentage by Parent	75.00%
HEICO Electronic [Member] \| Subsidiary Five [Member]
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Noncontrolling Interest, Ownership Percentage by Parent	80.10%
HEICO Electronic [Member] \| Subsidiary Six [Member]
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Noncontrolling Interest, Ownership Percentage by Parent	80.10%
HEICO Electronic [Member] \| Subsidiary Seven [Member]
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Noncontrolling Interest, Ownership Percentage by Parent	82.50%
HEICO Electronic [Member] \| Subsidiary Eight [Member]
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Noncontrolling Interest, Ownership Percentage by Parent	85.00%
HEICO Electronic [Member] \| Subsidiary Nine [Member]
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Noncontrolling Interest, Ownership Percentage by Parent	92.70%
HEICO Electronic [Member] \| Subsidiary Ten [Member]
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Noncontrolling Interest, Ownership Percentage by Parent	95.90%

ACQUISITIONS ACQUISITIONS (Total Consideration) (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Business Acquisition [Line Items]
Cash paid, net	$ 240,841	$ 59,775	$ 418,265
HEICO Electronic [Member] \| AAT [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross	317,500
Cash Acquired from Acquisition	(868)
Cash paid, net	316,632
Contingent purchase consideration	13,797
Additional purchase consideration	544
Total purchase consideration	$ 330,973

ACQUISITIONS ACQUISITIONS (Fair Value of Acquired Assets) (Details) - USD ($) $ in Thousands	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Assets acquired:
Goodwill	$ 1,268,703	$ 1,114,832	$ 1,081,306
HEICO Electronic [Member] \| AAT [Member]
Assets acquired:
Goodwill	157,901
Inventories	8,306
Accounts receivable	6,115
Property, plant and equipment	1,893
Other assets	208
Total assets acquired, excluding cash	333,423
Liabilities assumed:
Accounts payable	1,299
Accrued expenses	1,151
Total liabilities assumed	2,450
Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	330,973
HEICO Electronic [Member] \| AAT [Member] \| Trade Names [Member]
Assets acquired:
Identifiable intangible assets, indefinite-lived	20,000
HEICO Electronic [Member] \| AAT [Member] \| Customer Relationships [Member]
Assets acquired:
Identifiable intangible assets, finite-lived	100,000
HEICO Electronic [Member] \| AAT [Member] \| Intellectual Property [Member]
Assets acquired:
Identifiable intangible assets, finite-lived	$ 39,000

ACQUISITIONS ACQUISITIONS (Pro Forma Information) (Details) - HEICO Electronic [Member] - AAT [Member] $ / shares in Units, $ in Thousands	12 Months Ended
	Oct. 31, 2017 USD ($) $ / shares
Business Acquisition [Line Items]
Pro Forma Revenue	$ 1,582,653
Pro Forma Net Income (Loss) Attributable to HEICO	220,419
Pro Forma Net Income Attributable to Parent	$ 198,744
Pro Forma Net Income (Loss) Per Share Attributable To Common Shareholders [Abstract]
Pro Forma Earnings Per Share, Basic \| $ / shares	$ 1.51
Pro Forma Earnings Per Share, Diluted \| $ / shares	$ 1.47

ACQUISITIONS ACQUISITIONS (Total Consideration) (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Business Acquisition [Line Items]
Cash paid, net	$ 240,841	$ 59,775	$ 418,265
Other Acquisitions [Member]
Business Acquisition [Line Items]
Cash paid	243,550	61,931	109,346
Less: cash acquired	(2,466)	(4,000)	(7,713)
Cash paid, net	241,084	57,931	101,633
Contingent purchase consideration	2,107
Fair value of existing equity interest	1,417
Additional purchase consideration		(243)
Additional purchase consideration			1,300
Total purchase consideration	$ 244,608	$ 57,688	$ 102,933

ACQUISITIONS ACQUISITIONS (Fair Value of Acquired Assets) (Details 2) - USD ($) $ in Thousands	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Assets acquired:
Goodwill	$ 1,268,703	$ 1,114,832	$ 1,081,306
Other Acquisitions [Member]
Assets acquired:
Goodwill	156,177	38,359	49,932
Inventories	17,676	6,307	28,410
Accounts receivable	8,673	1,480	15,165
Other assets	907	126	982
Total assets acquired, excluding cash	299,674	67,399	147,211
Liabilities assumed:
Deferred income taxes	7,455	0	5,432
Accrued expenses	2,937	1,522	6,054
Accounts payable	2,879	671	7,696
Other liabilities	548	0	1,434
Total liabilities assumed	13,819	2,193	20,616
Noncontrolling interests in consolidated subsidiaries	41,247	7,518	23,662
Net assets acquired, excluding cash	244,608	57,688	102,933
Other Acquisitions [Member] \| Trade Names [Member]
Assets acquired:
Identifiable intangible assets	19,216	760	16,750
Other Acquisitions [Member] \| Customer Relationships [Member]
Assets acquired:
Identifiable intangible assets	47,553	11,620	29,500
Other Acquisitions [Member] \| Intellectual Property [Member]
Assets acquired:
Identifiable intangible assets	31,459	6,970	1,950
Property, plant and equipment	$ 18,013	$ 1,777	$ 4,522

ACQUISITIONS ACQUISITIONS (Weighted Average Intangible Assets Useful Life) (Details) - Other Acquisitions [Member]	12 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	11 years	7 years	12 years
Intellectual Property [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	15 years	10 years	13 years

ACQUISITIONS (Details Textuals) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
ACQUISITIONS (Details Textuals) - USD ($) $ in Thousands	Oct. 31, 2019	Jul. 31, 2019	Apr. 30, 2019	Jan. 31, 2019	Oct. 31, 2018	Jul. 31, 2018	Apr. 30, 2018	Jan. 31, 2018	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Business Acquisition [Line Items]
Net sales	$ 541,529	$ 532,324	$ 515,648	$ 466,146	$ 476,884	$ 465,825	$ 430,602	$ 404,410	$ 2,055,647	$ 1,777,721	$ 1,524,813
Net income	85,684	$ 81,098	$ 81,782	$ 79,332	67,377	$ 67,086	$ 59,618	$ 65,152	327,896	259,233	185,985
Acquisition Costs	3,200								3,200
Payments to Acquire Businesses, Net of Cash Acquired									240,841	59,775	418,265
Contingent consideration, liability	$ 18,326				$ 20,875				$ 18,326	20,875
STE [Member]
Business Acquisition [Line Items]
Percentage of interest owned by noncontrolling shareholders	15.00%								15.00%
Solid Sealing Technology [Member]
Business Acquisition [Line Items]
Percentage of interest owned by noncontrolling shareholders	15.00%								15.00%
Research Electronics International [Member]
Business Acquisition [Line Items]
Percentage of interest owned by noncontrolling shareholders	25.00%								25.00%
Decavo [Member]
Business Acquisition [Line Items]
Percentage of interest owned by noncontrolling shareholders	19.90%								19.90%
Apex [Member]
Business Acquisition [Line Items]
Percentage of interest owned by noncontrolling shareholders	7.30%								7.30%
FY2019 Acquisition [Member]
Business Acquisition [Line Items]
Pro Forma Revenue										$ 1,879,700
LLP Enterprises [Member] \| A2C [Member]
Business Acquisition [Line Items]
Percentage of interest owned by noncontrolling shareholders	19.90%								19.90%
AAT [Member]
Business Acquisition [Line Items]
Amount of contingent purchase consideration, the company could be required to pay	$ 13,800								$ 13,800
Net sales											10,200
Net income											2,500
AAT [Member] \| Customer Relationships [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life									15 years
AAT [Member] \| Intellectual Property [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life									15 years
Decavo [Member]
Business Acquisition [Line Items]
Amount of contingent purchase consideration, the company could be required to pay	$ 2,100								$ 2,100
FY 2017 Acquisition [Member]
Business Acquisition [Line Items]
Net sales											49,000
HEICO Electronic [Member] \| AAT [Member]
Business Acquisition [Line Items]
Effective Date of Acquisition									Sep. 15, 2017
Name of Acquired Entity									AeroAntenna Technology, Inc.
Description of Acquired Entity									AAT designs and produces high performance active antenna systems for commercial aircraft, precision guided munitions, other defense applications and commercial uses.
Payments to Acquire Businesses, Net of Cash Acquired									$ 316,632
Cash Acquired from Acquisition									$ 868
Pro Forma Revenue											$ 1,582,653
HEICO Electronic [Member] \| TTT-Cubed [Member]
Business Acquisition [Line Items]
Effective Date of Acquisition									Sep. 30, 2019
Name of Acquired Entity									TTT-Cubed, Inc.
Description of Acquired Entity									TTT is a designer and manufacturer of Radio Frequency (RF) Sources, Detectors, and Controllers for a certain wide range of aerospace and defense applications.
HEICO Electronic [Member] \| Bernier Connect SAS [Member]
Business Acquisition [Line Items]
Effective Date of Acquisition									Jul. 31, 2019
Name of Acquired Entity									Bernier Connect SAS
Description of Acquired Entity									Bernier is a designer and manufacturer of interconnect products used in demanding defense, aerospace and industrial applications, primarily for communications-related purposes.
HEICO Electronic [Member] \| Bernier Connect SAS [Member] \| Moulages Plastiques Industriels [Member]
Business Acquisition [Line Items]
Name of Acquired Entity									Moulages Plastiques Industriels de L'essonne
Description of Acquired Entity									a plastics manufacturer.
Percentage of interest acquired in the subsidiary	70.00%								70.00%
HEICO Electronic [Member] \| Research Electronics International [Member]
Business Acquisition [Line Items]
Effective Date of Acquisition									Jun. 30, 2019
Name of Acquired Entity									Research Electronics International, LLC
Description of Acquired Entity									REI is a designer and manufacturer of Technical Surveillance Countermeasures (TSCM) equipment to detect devices used for espionage and information theft.
Percentage of interest acquired in the subsidiary	75.00%								75.00%
HEICO Electronic [Member] \| Solid Sealing Technology [Member]
Business Acquisition [Line Items]
Effective Date of Acquisition									Feb. 28, 2019
Name of Acquired Entity									Solid Sealing Technology, Inc.
Description of Acquired Entity									SST designs and manufactures high-reliability ceramic-to-metal feedthroughs and connectors for demanding environments within the defense, industrial, life science, medical, research, semiconductor, and other markets.
Percentage of interest acquired in the subsidiary	85.00%								85.00%
HEICO Electronic [Member] \| Freebird [Member]
Business Acquisition [Line Items]
Effective Date of Acquisition									Nov. 30, 2018
Name of Acquired Entity									Freebird Semiconductor Corporation
Description of Acquired Entity									Freebird is a fabless design and manufacturing company that offers advanced high-reliability wide-band gap power switching technology.
Percentage of interest acquired in the subsidiary	50.00%								50.00%
HEICO Electronic [Member] \| Apex [Member]
Business Acquisition [Line Items]
Effective Date of Acquisition									Nov. 30, 2018
Name of Acquired Entity									Apex Microtechnology, Inc.
Description of Acquired Entity									Apex designs and manufactures precision power analog monolithic, hybrid and open frame components for a certain wide range of aerospace, defense, industrial, measurement, medical and test applications.
Percentage of interest acquired in the subsidiary	92.70%								92.70%
HEICO Electronic [Member] \| Specialty Silicone Products [Member]
Business Acquisition [Line Items]
Effective Date of Acquisition									Nov. 30, 2018
Name of Acquired Entity									Specialty Silicone Products, Inc.
Description of Acquired Entity									SSP designs and manufactures silicone material for a variety of demanding applications used in aerospace, defense, research, oil and gas, testing, pharmaceuticals and other markets.
HEICO Electronic [Member] \| SST [Member]
Business Acquisition [Line Items]
Effective Date of Acquisition									Sep. 30, 2018
Name of Acquired Entity									SST Components, Inc. (“SST Components”)
Description of Acquired Entity									SST Components manufactures discrete semiconductor components, tests electronic components, and custom assembles a wide variety of prototype and off the shelf components into desired package styles for military, space and commercial uses.
Percentage of interest acquired in the subsidiary	53.10%								53.10%
HEICO Electronic [Member] \| ELT [Member]
Business Acquisition [Line Items]
Effective Date of Acquisition									Apr. 30, 2018
Description of Acquired Entity									The ELT Product Line designs and manufactures Emergency Locator Transmitter Beacons for the commercial aviation and defense markets that upon activation, transmit a distress signal to alert search and rescue operations of the aircraft's location.
HEICO Electronic [Member] \| STE [Member]
Business Acquisition [Line Items]
Effective Date of Acquisition									Feb. 28, 2018
Name of Acquired Entity									Sensor Technology Engineering, Inc. ("Sensor Technology")
Description of Acquired Entity									Sensor Technology designs and manufactures sophisticated nuclear radiation detectors for law enforcement, homeland security and military applications.
Percentage of interest acquired in the subsidiary	85.00%								85.00%
HEICO Electronic [Member] \| IDC [Member]
Business Acquisition [Line Items]
Effective Date of Acquisition									Nov. 30, 2017
Name of Acquired Entity									Interface Displays & Controls, Inc. ("IDC")
Description of Acquired Entity									IDC designs and manufactures electronic products for aviation, marine, military fighting vehicles, and embedded computing markets.
Heico Flight Support Corp [Member] \| LLP Enterprises [Member]
Business Acquisition [Line Items]
Name of Acquired Entity									LLP Enterprises, LLC
Heico Flight Support Corp [Member] \| LLP Enterprises [Member] \| A2C [Member]
Business Acquisition [Line Items]
Name of Acquired Entity									Air Cost Control
Description of Acquired Entity									A2C is a leading aviation electrical interconnect product distributor of items such as connectors, wire, cable, protection and fastening systems, in addition to distributing a wide range of electromechanical parts.
Heico Flight Support Corp [Member] \| Decavo [Member]
Business Acquisition [Line Items]
Effective Date of Acquisition									Feb. 28, 2019
Name of Acquired Entity									Decavo LLC
Description of Acquired Entity									Decavo designs and produces complex composite parts and assemblies incorporated into camera and related sensor assemblies and unmanned aerial vehicle ("UAV") airframes used in demanding defense and civilian applications.
Percentage of interest acquired in the subsidiary	80.10%								80.10%
Heico Flight Support Corp [Member] \| ODE [Member]
Business Acquisition [Line Items]
Effective Date of Acquisition									Aug. 31, 2018
Name of Acquired Entity									Optical Display Engineering ("ODE")
Description of Acquired Entity									ODE is a Federal Aviation Administration ("FAA")-authorized Part 145 Repair Station focusing on the repair of LCD screens and display modules for aviation displays used in civilian and military aircraft. ODE also holds FAA-Parts Manufacturer Approval authority to supply products that it repairs.
Heico Flight Support Corp [Member] \| CBD [Member]
Business Acquisition [Line Items]
Effective Date of Acquisition									Jun. 30, 2017
Name of Acquired Entity									Carbon by Design
Description of Acquired Entity									CBD is a manufacturer of composite components for UAVs, rockets, spacecraft and other specialized applications.
Heico Flight Support Corp [Member] \| A2C [Member]
Business Acquisition [Line Items]
Effective Date of Acquisition									Apr. 30, 2017
Percentage of interest acquired in the subsidiary	80.10%								80.10%

SELECTED FINANCIAL STATEMENT INFORMATION, Accounts Receivable (Details) - USD ($) $ in Thousands	Oct. 31, 2019	Oct. 31, 2018
Accounts receivable	$ 277,992	$ 240,544
Less: Allowance for doubtful accounts	(3,666)	(3,258)
Accounts receivable, net	$ 274,326	$ 237,286

SELECTED FINANCIAL STATEMENT INFORMATION, Inventories (Details) - USD ($) $ in Thousands	Oct. 31, 2019	Nov. 01, 2018	Oct. 31, 2018
Finished products	$ 199,880		$ 192,758
Work in process	32,548		49,315
Materials, parts, assemblies and supplies	187,891		158,039
Contracts-in-process	0		1,649
Less: Billings to date	0		(208)
Inventories, net of valuation reserves	$ 420,319	$ 372,141	$ 401,553

SELECTED FINANCIAL STATEMENT INFORMATION, Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Property, Plant and Equipment [Line Items]
Land	$ 6,820	$ 5,864
Buildings and improvements	116,997	101,424
Machinery, equipment and tooling	253,127	230,108
Construction in progress	8,382	5,044
Property, Plant and Equipment, Gross	385,326	342,440
Less: Accumulated depreciation and amortization	(211,981)	(187,701)
Property, plant and equipment, net	$ 173,345	$ 154,739	$ 129,883

SELECTED FINANCIAL STATEMENT INFORMATION, Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Oct. 31, 2019	Nov. 01, 2018	Oct. 31, 2018
Accrued employee compensation and related payroll taxes	$ 112,602		$ 97,048
Deferred revenue	23,809		28,262
Accrued customer rebates and credits	17,978		16,861
Accrued additional purchase consideration	497		6,138
Other Liabilities, Current	24,071		23,205
Accrued expenses and other current liabilities	$ 178,957	$ 162,926	$ 171,514

SELECTED FINANCIAL STATEMENT INFORMATION SELECTED FINANCIAL STATEMENT INFORMATION, Research and Development Expenses (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
R&D expenses	$ 66,630	$ 57,450	$ 46,473

SELECTED FINANCIAL STATEMENT INFORMATION SELECTED FINANCIAL STATEMENT INFORMATION, Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Balance Start	$ (15,256)	$ (10,556)
Unrealized gain/(loss)	(1,708)	(5,327)	$ 15,696
Amortization of unrealized loss	25	13
Accumulated Other Comprehensive Income (Loss), Balance End	(16,739)	(15,256)	(10,556)
Foreign Currency Translation [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Balance Start	(14,370)	(9,533)
Foreign Currency Translation Unrealized (loss) gain	(619)	(4,837)
Accumulated Other Comprehensive Income (Loss), Balance End	(14,989)	(14,370)	(9,533)
Pension Benefit Obligation [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Balance Start	(886)	(1,023)
Unrealized gain/(loss)	(889)	124
Amortization of unrealized loss	25	13
Accumulated Other Comprehensive Income (Loss), Balance End	(1,750)	(886)	$ (1,023)
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Unrealized gain/(loss)	$ (1,508)	$ (4,713)

SELECTED FINANCIAL STATEMENT INFORMATION (Details Textuals) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Property, Plant and Equipment [Abstract]
Property, plant and equipment, net	$ 173,345	$ 154,739	$ 129,883
Amortization	57,739	53,952	42,945
Assets under capital lease	11,700	11,900
Assets under capital lease, accumulated depreciation	2,100	1,500
Depreciation and amortization	83,497	77,191	64,823
Total customer rebates and credits deducted within net sales	$ 9,000	9,900	11,000
Other Assets and Liabilities, Noncurrent [Abstract]
Defined Contribution Plan, Employer Matching Contribution, Percent of Match	50.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	6.00%
Contributions to the plan charged	$ 6,100	5,900	4,600
Deferred compensation plans	151,891	132,737
Leadership Compensation Plan [Member]
Other Assets and Liabilities, Noncurrent [Abstract]
Employee related deferred compensation plans, specified as other long-term liabilities	151,100	125,800
Tooling [Member]
Property, Plant and Equipment [Abstract]
Property, plant and equipment, net	8,800	8,200
Amortization	3,100	2,800	2,700
Property, Plant and Equipment, Exclusive of Tooling [Member]
Property, Plant and Equipment [Abstract]
Depreciation and amortization	25,800	23,200	$ 21,900
Leadership Compensation Plan [Member]
Other Assets and Liabilities, Noncurrent [Abstract]
Deferred compensation plans	$ 151,900	$ 126,800

GOODWILL AND OTHER INTANGIBLE ASSETS, Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2019	Oct. 31, 2018
Goodwill [Roll Forward]
Opening Balances	$ 1,114,832	$ 1,081,306
Goodwill acquired	156,177	38,320
Foreign currency translation adjustments	2,345	2,763
Adjustments to goodwill	39	(2,031)
Ending Balances	1,268,703	1,114,832
Flight Support Group [Member]
Goodwill [Roll Forward]
Opening Balances	398,694	388,606
Goodwill acquired	12,891	10,586
Foreign currency translation adjustments	1,580	1,470
Adjustments to goodwill	39	972
Ending Balances	410,044	398,694
Electronic Technologies Group [Member]
Goodwill [Roll Forward]
Opening Balances	716,138	692,700
Goodwill acquired	143,286	27,734
Foreign currency translation adjustments	765	1,293
Adjustments to goodwill	0	(3,003)
Ending Balances	$ 858,659	$ 716,138

GOODWILL AND OTHER INTANGIBLE ASSETS, Identifiable Intangible Assets (Details) - USD ($) $ in Thousands	Oct. 31, 2019	Oct. 31, 2018
Amortizing Assets:
Customer Relationships, Gross	$ 411,076	$ 373,946
Intellectual Property, Gross	216,359	185,983
License, Gross	6,559	6,559
Patents, Gross	986	927
Noncompete Agreements, Gross	813	814
Trade Names, Gross	450	466
Gross Carrying Amount	636,243	568,695
Accumulated Amortization	(238,652)	(196,516)
Amortizing Net Carrying Amount	397,591	372,179
Non-Amortizing Assets:
Indefinite-Lived Trade Names	153,102	134,181
Total Gross Carrying Amount	789,345	702,876
Total Net Carrying Amount	550,693	506,360
Customer Relationships [Member]
Amortizing Assets:
Accumulated Amortization	(162,722)	(135,359)
Amortizing Net Carrying Amount	248,354	238,587
Intellectual Property [Member]
Amortizing Assets:
Accumulated Amortization	(70,169)	(56,055)
Amortizing Net Carrying Amount	146,190	129,928
Licensing Agreements [Member]
Amortizing Assets:
Accumulated Amortization	(4,102)	(3,522)
Amortizing Net Carrying Amount	2,457	3,037
Patents [Member]
Amortizing Assets:
Accumulated Amortization	(666)	(609)
Amortizing Net Carrying Amount	320	318
Noncompete Agreements [Member]
Amortizing Assets:
Accumulated Amortization	(813)	(814)
Amortizing Net Carrying Amount	0	0
Trade Names [Member]
Amortizing Assets:
Accumulated Amortization	(180)	(157)
Amortizing Net Carrying Amount	$ 270	$ 309

GOODWILL AND OTHER INTANGIBLE ASSETS (Details Textuals) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Business Acquisition, Goodwill, Expected Tax Deductible Amount	$ 92.0
Amortization expense related to intangible assets	53.7	$ 50.1	$ 39.5
Estimated Amortization expense related to intangible assets, year one	53.8
Estimated Amortization expense related to intangible assets, year two	50.9
Estimated Amortization expense related to intangible assets, year three	44.4
Estimated Amortization expense related to intangible assets, year four	39.1
Estimated Amortization expense related to intangible assets, year five	34.6
Estimated Amortization expense related to intangible assets, year, there after	$ 174.8

LONG-TERM DEBT (Details) - USD ($) $ in Thousands	Oct. 31, 2019	Oct. 31, 2018
Borrowings under revolving credit facility	$ 553,000	$ 523,000
Capital leases and notes payable	8,955	9,470
Total debt and capital leases	561,955	532,470
Less: Current maturities of long-term debt	(906)	(859)
Long-term debt, net of current maturities	$ 561,049	$ 531,611

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References + Details

LONG-TERM DEBT, Future Lease Payments (Details) $ in Thousands	Oct. 31, 2019 USD ($)
Lease payments in year one	$ 1,213
Lease payments in year two	1,212
Lease payments in year three	1,203
Lease payments in year four	906
Lease payments in year five	832
Thereafter	5,596
Total minimum lease payments	10,962
Less: amount representing interest	(2,327)
Present value of minimum lease payments	$ 8,635

LONG-TERM DEBT (Details Textuals) - USD ($) $ in Millions	12 Months Ended
LONG-TERM DEBT (Details Textuals) - USD ($) $ in Millions	Oct. 31, 2019	Oct. 31, 2018
Debt Disclosure [Abstract]
Interest Rate	3.00%	3.40%
Credit Facility [Abstract]
Credit Facility, Current Borrowing Capacity	$ 1,300
Credit Facility, Expiration Date	Nov. 30, 2022
Line of Credit Facility Change in Borrowing Capacity	$ 350
Credit Facility, Maximum Borrowing Capacity	$ 1,650
Credit facility, interest rate description	Borrowings under the Credit Facility accrue interest at the Company’s election of the Base Rate or the Eurocurrency Rate, plus in each case, the Applicable Rate (based on the Company’s Total Leverage Ratio). The Base Rate for any day is a fluctuating rate per annum equal to the highest of (i) the Prime Rate; (ii) the Federal Funds Rate plus .50%; and (iii) the Eurocurrency Rate for an Interest Period of one month plus 100 basis points. The Eurocurrency Rate is the rate per annum obtained by dividing LIBOR for the applicable Interest Period by a percentage equal to 1.00 minus the daily average Eurocurrency Reserve Rate for such Interest Period, as such capitalized terms are defined in the Credit Facility.
Minimum [Member]
Credit Facility [Abstract]
Credit facility unused capacity, commitment fee percentage	0.125%
Maximum [Member]
Credit Facility [Abstract]
Credit facility unused capacity, commitment fee percentage	0.30%
Eurodollar [Member] \| Minimum [Member]
Credit Facility [Abstract]
Credit Facility, Interest Rate, Increase (Decrease)	1.00%
Eurodollar [Member] \| Maximum [Member]
Credit Facility [Abstract]
Credit Facility, Interest Rate, Increase (Decrease)	2.00%
Base Rate [Member] \| Minimum [Member]
Credit Facility [Abstract]
Credit Facility, Interest Rate, Increase (Decrease)	0.00%
Base Rate [Member] \| Maximum [Member]
Credit Facility [Abstract]
Credit Facility, Interest Rate, Increase (Decrease)	1.00%
Foreign Line of Credit [Member]
Credit Facility [Abstract]
Credit Facility, Current Borrowing Capacity	$ 100
Letter of Credit [Member]
Credit Facility [Abstract]
Credit Facility, Current Borrowing Capacity	$ 50

REVENUE (Contract Assets and Liabilities) (Details) - USD ($) $ in Thousands	9 Months Ended
	Jul. 31, 2019	Oct. 31, 2019	Nov. 01, 2018	Oct. 31, 2018
Revenue from Contract with Customer [Abstract]
Contract assets		$ 43,132	$ 54,272	$ 14,183
Contract liabilities		23,809	19,674
Net contract assets		$ 19,323	$ 34,598
Change in contract assets	$ (11,140)
Change in contract liabilities	4,135
Change in net contract assets	$ (15,275)

REVENUE (Disaggregation of Revenue, by Product Line) (Details) - USD ($)
$ in Thousands

12 Months Ended

Oct. 31, 2019

Oct. 31, 2018

Oct. 31, 2017

Disaggregation of Revenue [Line Items]

Revenue from Contract with Customer

$ 2,055,647

$ 1,777,721

$ 1,524,813

Flight Support Group [Member]

Disaggregation of Revenue [Line Items]

Revenue from Contract with Customer

1,240,183

1,097,937

967,540

Flight Support Group [Member] | Aftermarket Replacement Parts [Member]

Disaggregation of Revenue [Line Items]

Revenue from Contract with Customer

^[1]

678,001

582,562

489,644

Flight Support Group [Member] | Repair and Overhaul Parts and Services [Member]

Disaggregation of Revenue [Line Items]

Revenue from Contract with Customer

^[2]

299,323

286,454

270,482

Flight Support Group [Member] | Specialty Products [Member]

Disaggregation of Revenue [Line Items]

Revenue from Contract with Customer

^[3]

262,859

228,921

207,414

Electronic Technologies Group [Member]

Disaggregation of Revenue [Line Items]

Revenue from Contract with Customer

834,522

701,827

574,261

Electronic Technologies Group [Member] | Electronic Components for Defense, Space and Aerospace [Member]

Disaggregation of Revenue [Line Items]

Revenue from Contract with Customer

^[4]

633,685

547,088

420,991

Electronic Technologies Group [Member] | Other Electronic Components [Member]

Disaggregation of Revenue [Line Items]

Revenue from Contract with Customer

^[5]

200,837

154,739

153,270

Corporate And Eliminations [Member]

Disaggregation of Revenue [Line Items]

Revenue from Contract with Customer

$ (19,058)

$ (22,043)

$ (16,988)

[1]	⁽¹⁾ Includes various jet engine and aircraft component replacement parts.
[2]	⁽²⁾ Includes primarily the sale of parts consumed in various repair and overhaul services on selected jet engine and aircraft components, avionics, instruments, composites and flight surfaces of commercial and military aircraft.
[3]	⁽³⁾ Includes primarily the sale of specialty components such as thermal insulation blankets, renewable/reusable insulation systems, advanced niche components, complex composite assemblies, and expanded foil mesh.
[4]	⁽⁴⁾ Includes various component parts such as electro-optical infrared simulation and test equipment, electro-optical laser products, electro-optical, microwave and other power equipment, high-speed interface products, power conversion products, underwater locator beacons, emergency locator transmission beacons, traveling wave tube amplifiers, microwave power modules, three-dimensional microelectronic and stacked memory products, crashworthy and ballistically self-sealing auxiliary fuel systems, radio frequency (RF) and microwave amplifiers, transmitters and receivers, high performance communications and electronic intercept receivers and tuners, high performance active antenna systems, and technical surveillance countermeasures equipment.
[5]	⁽⁵⁾ Includes various component parts such as electromagnetic and radio interference shielding, high voltage interconnection devices, high voltage advanced power electronics, harsh environment connectivity products, custom molded cable assemblies, and silicone material for a variety of demanding applications.

REVENUE (Disaggregation of Revenue, by Industry) (Details) - USD ($)
$ in Thousands

12 Months Ended

Oct. 31, 2019

Oct. 31, 2018

Oct. 31, 2017

Disaggregation of Revenue [Line Items]

Revenue from Contract with Customer

$ 2,055,647

$ 1,777,721

$ 1,524,813

Flight Support Group [Member]

Disaggregation of Revenue [Line Items]

Revenue from Contract with Customer

1,240,183

1,097,937

967,540

Flight Support Group [Member] | Aerospace [Member]

Disaggregation of Revenue [Line Items]

Revenue from Contract with Customer

1,004,088

890,059

781,344

Flight Support Group [Member] | Defense and Space [Member]

Disaggregation of Revenue [Line Items]

Revenue from Contract with Customer

190,076

163,330

146,708

Flight Support Group [Member] | Other Industries [Member]

Disaggregation of Revenue [Line Items]

Revenue from Contract with Customer

^[1]

46,019

44,548

39,488

Electronic Technologies Group [Member]

Disaggregation of Revenue [Line Items]

Revenue from Contract with Customer

834,522

701,827

574,261

Electronic Technologies Group [Member] | Aerospace [Member]

Disaggregation of Revenue [Line Items]

Revenue from Contract with Customer

85,604

71,235

48,832

Electronic Technologies Group [Member] | Defense and Space [Member]

Disaggregation of Revenue [Line Items]

Revenue from Contract with Customer

531,029

452,714

368,234

Electronic Technologies Group [Member] | Other Industries [Member]

Disaggregation of Revenue [Line Items]

Revenue from Contract with Customer

^[2]

217,889

177,878

157,195

Corporate And Eliminations [Member]

Disaggregation of Revenue [Line Items]

Revenue from Contract with Customer

$ (19,058)

$ (22,043)

$ (16,988)

[1]	⁽¹⁾ Principally industrial products.
[2]	⁽²⁾ Principally other electronics and medical products.

REVENUE (Details Textuals) - USD ($) $ in Millions	12 Months Ended
REVENUE (Details Textuals) - USD ($) $ in Millions	Oct. 31, 2019	Jul. 31, 2019
Revenue from Contract with Customer [Abstract]
Liability, Revenue Recognized	$ 16.5
Expected Timing of Satisfaction, Start Date [Axis]: 2019-11-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining Performance Obligation, Amount	$ 453.6
Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year 1 day
Expected Timing of Satisfaction, Start Date [Axis]: 2019-11-02
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining Performance Obligation, Amount		$ 275.7
Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Expected Timing of Satisfaction, Start Date [Axis]: 2020-11-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining Performance Obligation, Amount		$ 177.9
Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year 1 day

FAIR VALUE MEASUREMENTS, Assets and Liabilities, Measured on Recurring Basis (Details) - USD ($)	Oct. 31, 2019	Oct. 31, 2018
Assets [Abstract]
Deferred Compensation Plan Assets	$ 151,891,000	$ 132,737,000
Liabilities [Abstract]
Contingent consideration, liability	18,326,000	20,875,000
Fair Value, Inputs, Level 1 [Member]
Assets [Abstract]
Deferred Compensation Plan Assets	20,000	9,482,000
Liabilities [Abstract]
Contingent consideration, liability	0	0
Fair Value, Inputs, Level 2 [Member]
Assets [Abstract]
Deferred Compensation Plan Assets	151,871,000	123,255,000
Liabilities [Abstract]
Contingent consideration, liability	0	0
Fair Value, Inputs, Level 3 [Member]
Assets [Abstract]
Deferred Compensation Plan Assets	0	0
Liabilities [Abstract]
Contingent consideration, liability	18,326,000	20,875,000
Corporate Owned Life Insurance [Member]
Assets [Abstract]
Deferred Compensation Plan Assets	151,871,000	123,255,000
Corporate Owned Life Insurance [Member] \| Fair Value, Inputs, Level 1 [Member]
Assets [Abstract]
Deferred Compensation Plan Assets	0	0
Corporate Owned Life Insurance [Member] \| Fair Value, Inputs, Level 2 [Member]
Assets [Abstract]
Deferred Compensation Plan Assets	151,871,000	123,255,000
Corporate Owned Life Insurance [Member] \| Fair Value, Inputs, Level 3 [Member]
Assets [Abstract]
Deferred Compensation Plan Assets	0	0
Money Market Funds [Member]
Assets [Abstract]
Deferred Compensation Plan Assets	20,000	3,560,000
Money Market Funds [Member] \| Fair Value, Inputs, Level 1 [Member]
Assets [Abstract]
Deferred Compensation Plan Assets	20,000	3,560,000
Money Market Funds [Member] \| Fair Value, Inputs, Level 2 [Member]
Assets [Abstract]
Deferred Compensation Plan Assets	0	0
Money Market Funds [Member] \| Fair Value, Inputs, Level 3 [Member]
Assets [Abstract]
Deferred Compensation Plan Assets	$ 0	0
Equity Securities [Member]
Assets [Abstract]
Deferred Compensation Plan Assets		3,179,000
Equity Securities [Member] \| Fair Value, Inputs, Level 1 [Member]
Assets [Abstract]
Deferred Compensation Plan Assets		3,179,000
Equity Securities [Member] \| Fair Value, Inputs, Level 2 [Member]
Assets [Abstract]
Deferred Compensation Plan Assets		0
Equity Securities [Member] \| Fair Value, Inputs, Level 3 [Member]
Assets [Abstract]
Deferred Compensation Plan Assets		0
Equity Funds [Member]
Assets [Abstract]
Deferred Compensation Plan Assets		1,437,000
Equity Funds [Member] \| Fair Value, Inputs, Level 1 [Member]
Assets [Abstract]
Deferred Compensation Plan Assets		1,437,000
Equity Funds [Member] \| Fair Value, Inputs, Level 2 [Member]
Assets [Abstract]
Deferred Compensation Plan Assets		0
Equity Funds [Member] \| Fair Value, Inputs, Level 3 [Member]
Assets [Abstract]
Deferred Compensation Plan Assets		0
Other Defined Deferred Compensation Plan [Member]
Assets [Abstract]
Deferred Compensation Plan Assets		1,306,000
Other Defined Deferred Compensation Plan [Member] \| Fair Value, Inputs, Level 1 [Member]
Assets [Abstract]
Deferred Compensation Plan Assets		1,306,000
Other Defined Deferred Compensation Plan [Member] \| Fair Value, Inputs, Level 2 [Member]
Assets [Abstract]
Deferred Compensation Plan Assets		0
Other Defined Deferred Compensation Plan [Member] \| Fair Value, Inputs, Level 3 [Member]
Assets [Abstract]
Deferred Compensation Plan Assets		$ 0

INCOME TAXES INCOME TAXES, Domestic and Foreign Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Income Tax Disclosure [Abstract]
Domestic	$ 386,584	$ 309,123	$ 264,420
Foreign	51,257	47,163	33,540
Income before taxes and noncontrolling interests	$ 437,841	$ 356,286	$ 297,960

FAIR VALUE MEASUREMENTS FAIR VALUE MEASUREMENTS, Contingent Consideration Level 3 Valuation Inputs (Details) - Fair Value, Inputs, Level 3 [Member]	Oct. 31, 2019
Measurement Input, Long-term Revenue Growth Rate [Member] \| FY2019 Acquisition [Member] \| Minimum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Business Combination, Contingent Consideration, Liability, Measurement Input	(0.07)
Measurement Input, Long-term Revenue Growth Rate [Member] \| FY2019 Acquisition [Member] \| Maximum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Business Combination, Contingent Consideration, Liability, Measurement Input	0.09
Measurement Input, Long-term Revenue Growth Rate [Member] \| FY 2017 Acquisition [Member] \| Minimum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Business Combination, Contingent Consideration, Liability, Measurement Input	(0.03)
Measurement Input, Long-term Revenue Growth Rate [Member] \| FY 2017 Acquisition [Member] \| Maximum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Business Combination, Contingent Consideration, Liability, Measurement Input	0.10
Measurement Input, Long-term Revenue Growth Rate [Member] \| FY 2016 Acquisition [Member] \| Minimum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Business Combination, Contingent Consideration, Liability, Measurement Input	(0.11)
Measurement Input, Long-term Revenue Growth Rate [Member] \| FY 2016 Acquisition [Member] \| Maximum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Business Combination, Contingent Consideration, Liability, Measurement Input	0.03
Measurement Input, Discount Rate [Member] \| FY2019 Acquisition [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Business Combination, Contingent Consideration, Liability, Measurement Input	0.057
Measurement Input, Discount Rate [Member] \| FY 2017 Acquisition [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Business Combination, Contingent Consideration, Liability, Measurement Input	0.046
Measurement Input, Discount Rate [Member] \| FY 2016 Acquisition [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Business Combination, Contingent Consideration, Liability, Measurement Input	0.030

INCOME TAXES, Current and Deferred Expense Components (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Current:
Federal	$ 56,670	$ 61,548	$ 85,047
State	12,795	9,420	6,820
Foreign	15,027	12,608	9,529
Current income tax expense	84,492	83,576	101,396
Deferred:
Federal	(3,140)	(13,115)	(9,661)
State	(1,263)	1,578	(499)
Foreign	(1,989)	(1,439)	(936)
Deferred Income Tax Expense (Benefit)	(6,392)	(12,976)	(11,096)
Income tax expense	$ 78,100	$ 70,600	$ 90,300

FAIR VALUE MEASUREMENTS, Assets and Liabilities, Measured at Fair Value Using Unobservable Inputs (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Payment of contingent consideration	$ 2,630		$ 1,100
Liabilities, Ending Balance	18,326
Liabilities [Abstract]
Total liabilities	1,086,287	$ 1,018,342
Fair Value, Inputs, Level 3 [Member]
Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Liabilities, Opening Balance	20,875	27,573
Payment of contingent consideration	(7,178)	(5,425)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases	2,630
Contingent consideration related to acquisition	2,107	(1,365)
Liabilities, Ending Balance		20,875	$ 27,573
Liabilities [Abstract]
Accrued Liabilities, Current	497
Other Liabilities, Noncurrent	17,829
Total liabilities	18,326
Fair Value, Inputs, Level 3 [Member] \| Foreign Currency Gain (Loss) [Member]
Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Change in Unrealized Gain (Loss)	$ (108)	$ 92

INCOME TAXES, Rate Reconciliation (Details)		12 Months Ended
INCOME TAXES, Rate Reconciliation (Details)	Jan. 01, 2018	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Federal statutory income tax rate	35.00%	21.00%	23.30%	35.00%
State taxes, less applicable federal income tax reduction		3.00%	2.90%	1.90%
Tax benefit related to stock option exercises		(3.80%)	(0.50%)	(1.00%)
Discrete net tax benefit related to Tax Act			(3.40%)
Research and development tax credits		(1.70%)	(2.00%)	(1.80%)
Foreign derived intangible income deduction		(0.014)
Tax-exempt (gains) losses on corporate-owned life insurance policies		0.60%	(0.10%)	1.80%
Nondeductible compensation		0.80%	0.20%
Domestic production activities tax deduction			(0.80%)	(1.10%)
Other, net		0.50%	0.00%	(0.90%)
Effective tax rate		17.80%	19.80%	30.30%

FAIR VALUE MEASUREMENTS (Details Textuals) $ in Thousands, € in Millions	9 Months Ended		12 Months Ended
	Jul. 31, 2019 USD ($)	Jul. 31, 2019 EUR (€)	Oct. 31, 2019 USD ($)	Oct. 31, 2017 USD ($)	Oct. 31, 2018 USD ($)	Oct. 31, 2018 EUR (€)
Business Acquisition, Contingent Consideration [Line Items]
Deferred Compensation Plan Assets			$ 151,891		$ 132,737
Payment of contingent consideration			2,630	$ 1,100
Contingent consideration, liability			18,326		20,875
Flight Support Group [Member] \| FY2019 Acquisition [Member]
Business Acquisition, Contingent Consideration [Line Items]
Amount of contingent purchase consideration, the company could be required to pay			6,400
Contingent consideration, liability			1,100
Flight Support Group [Member] \| FY 2015 Acquisition [Member]
Business Acquisition, Contingent Consideration [Line Items]
Payment of contingent consideration	$ 6,800
Contingent Consideration, Liability, Current					5,800
Electronic Technologies Group [Member] \| FY 2017 Acquisition [Member]
Business Acquisition, Contingent Consideration [Line Items]
Amount of contingent purchase consideration, the company could be required to pay			20,000
Contingent consideration, liability			16,700		13,900
Electronic Technologies Group [Member] \| FY 2016 Acquisition [Member]
Business Acquisition, Contingent Consideration [Line Items]
Amount of contingent purchase consideration, the company could be required to pay			1,100
Payment of contingent consideration			300
Contingent consideration, liability			$ 500
Euro Member Countries, Euro \| Flight Support Group [Member] \| FY 2015 Acquisition [Member]
Business Acquisition, Contingent Consideration [Line Items]
Payment of contingent consideration \| €		€ 6.1
Contingent Consideration, Liability, Current \| €						€ 5.1
Closed Plan [Member]
Business Acquisition, Contingent Consideration [Line Items]
Deferred Compensation Plan Assets					5,900
Closed Plan [Member]
Business Acquisition, Contingent Consideration [Line Items]
Deferred Compensation Liability, Classified, Noncurrent					$ 5,900

INCOME TAXES, Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Oct. 31, 2019	Oct. 31, 2018
Deferred tax assets:
Deferred compensation liability	$ 35,437	$ 31,152
Inventories	23,858	22,204
Share-based compensation	10,206	9,811
Bonus accrual	6,463	4,474
Customer rebates accrual	2,324	1,526
Vacation accrual	1,452	1,456
Other	8,806	7,152
Deferred Tax Assets, Gross	88,546	77,775
Deferred tax liabilities:
Goodwill and other intangible assets	(122,075)	(112,533)
Property, plant and equipment	(14,137)	(11,615)
Deferred Tax Liabilities, Tax Deferred Income	(3,277)
Other	(553)	(271)
Total deferred tax liabilities	(140,042)	(124,419)
Net deferred tax liabilities	$ (51,496)	$ (46,644)

INCOME TAXES, Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2019	Oct. 31, 2018
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balances as of beginning of year	$ 2,100	$ 2,040
Increases related to current year tax positions	653	591
Increases related to prior year tax positions	45	20
Settlements	0	(394)
Lapse of statutes of limitations	(128)	(157)
Balances as of end of year	$ 2,670	$ 2,100

INCOME TAXES (Details Textuals) - USD ($) $ in Thousands		3 Months Ended	12 Months Ended
INCOME TAXES (Details Textuals) - USD ($) $ in Thousands	Jan. 01, 2018	Jan. 31, 2018	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Income Tax Disclosure [Abstract]
Federal Statutory Income Tax Rate, Percent	35.00%		21.00%	23.30%	35.00%
Effective Income Tax Rate Reconciliation, Tax Cuts and Jobs Act, Percent	0.21
Remeasurement of Deferred Tax Liabilities for Change in Tax Rate				$ 16,500
Transition Tax Expense from Unremitted Earnings from Foreign Subsidiaries		$ 11,900		$ 4,400
Effective Income Tax Rate, Continuing Operations			17.80%	19.80%	30.30%
Tax benefit from stock option exercises			$ 14,300
Gross unrecognized tax benefits related to uncertain tax positions			2,670	$ 2,100	$ 2,040
Unrecognized tax benefits that would impact effective tax rate			$ 2,100	$ 1,700

SHAREHOLDERS' EQUITY (Details Textuals) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Jul. 31, 2019	Oct. 31, 2019	Oct. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock repurchase program, number of shares authorized to be repurchased (in shares)		4,886,353
Flight Support Group [Member] \| Eight Acquired FSG Subsidiaries [Member]
Noncontrolling Interest [Line Items]
Total purchase consideration	$ 91.5
Percentage of interest acquired in the subsidiary	20.00%
Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation		476,586	332,140
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation		$ 53.1	$ 23.9
HEICO Aerospace [Member]
Noncontrolling Interest [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent	80.00%
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	20.00%
Common Class A [Member] \| Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation		111,730	18,145
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation		$ 10.9	$ 1.1

SHARE-BASED COMPENSATION, Share-based Activity (Details) - $ / shares shares in Thousands	12 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Shares Available for Grant [Roll Forward]
Opening Balance Outstanding Shares (Shares Available For Grant)	4,612	830	2,016
Shares approved by Shareholders (Shares Available for Grant)	5,000	5,000
Granted (Available for Grant)	(538)	(412)	(1,186)
Cancelled (Available for Grant)	11	24
Ending Balance Outstanding Shares (Shares Available For Grant)	4,085	4,612	830
Shares Outstanding [Roll Forward]
Outstanding (Shares Under Option)	6,400	7,297	6,520
Granted (Shares Under Option)	538	412	1,186
Exercised (Shares Under Option)	(2,235)	(1,285)	(409)
Cancelled (Shares Under Option)	(11)	(24)
Outstanding (Shares Under Option)	4,692	6,400	7,297
Weighted Average Exercise Price [Roll Forward]
Outstanding (in dollars per share)	$ 23.19	$ 18.58	$ 14.23
Granted (in dollars per share)	73.30	65.64	41.37
Exercised (in dollars per share)	12.98	10.54	15.27
Cancelled (in dollars per share)	49.79	28.85
Outstanding (in dollars per share)	$ 33.73	$ 23.19	$ 18.58
2012 Incentive Compensation Plan [Member]
Shares Available for Grant [Roll Forward]
Cancelled (Available for Grant)		(830)

SHARE-BASED COMPENSATION, Options Outstanding and Exercisable (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Number Outstanding (in shares)	4,692	6,400	7,297	6,520
Outstanding Weighted Average Exercise Price (in dollars per share)	$ 33.73	$ 23.19	$ 18.58	$ 14.23
Outstanding Weighted Average Contractual Life (in years)	5 years 8 months 12 days
Outstanding Aggregated Intrinsic Value (in dollars)	$ 335,939
Number Exercisable (in shares)	2,785
Exercisable Weighted Average Exercise Price (in dollars per share)	$ 21.57
Exercisable Weighted Average Contractual Life (in years)	4 years 2 months 12 days
Exercisable Aggregate Intrinsic Value (in dollars)	$ 234,156
Heico Common Stock [Member]
Number Outstanding (in shares)	1,682
Outstanding Weighted Average Exercise Price (in dollars per share)	$ 35.91
Outstanding Weighted Average Contractual Life (in years)	5 years 7 months 6 days
Outstanding Aggregated Intrinsic Value (in dollars)	$ 147,012
Number Exercisable (in shares)	1,030
Exercisable Weighted Average Exercise Price (in dollars per share)	$ 22.81
Exercisable Weighted Average Contractual Life (in years)	4 years 2 months 12 days
Exercisable Aggregate Intrinsic Value (in dollars)	$ 103,538
Common Class A [Member]
Number Outstanding (in shares)	3,010
Outstanding Weighted Average Exercise Price (in dollars per share)	$ 32.52
Outstanding Weighted Average Contractual Life (in years)	5 years 9 months 18 days
Outstanding Aggregated Intrinsic Value (in dollars)	$ 188,927
Number Exercisable (in shares)	1,755
Exercisable Weighted Average Exercise Price (in dollars per share)	$ 20.85
Exercisable Weighted Average Contractual Life (in years)	4 years 2 months 12 days
Exercisable Aggregate Intrinsic Value (in dollars)	$ 130,618

SHARE-BASED COMPENSATION, Information on Options Exercised (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Proceeds from stock option exercises	$ 8,547	$ 4,031	$ 5,659
Tax benefit from stock option exercises	16,490	2,162	3,087
Intrinsic value of stock option exercises	$ 204,901	$ 75,152	$ 10,376

SHARE-BASED COMPENSATION, Assumptions for Option Grants Fair Value Calculation (Details) - $ / shares	12 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Common Class A [Member]
Expected stock price volatility	24.81%	27.69%	28.18%
Risk-free interest rate	2.69%	2.81%	2.06%
Dividend yield	0.22%	0.29%	0.31%
Forfeiture rate	0.00%	0.00%	0.00%
Expected option life (years)	6 years	8 years	7 years
Weighted average fair value	$ 19.64	$ 20.93	$ 12.47
Heico Common Stock [Member]
Expected stock price volatility	28.52%	31.00%	37.89%
Risk-free interest rate	2.52%	2.83%	2.44%
Dividend yield	0.22%	0.24%	0.26%
Forfeiture rate	0.00%	0.00%	0.00%
Expected option life (years)	8 years	9 years	9 years
Weighted average fair value	$ 33.88	$ 30.00	$ 21.36

SHARE-BASED COMPENSATION (Details Textuals) - USD ($) shares in Thousands, $ in Millions	12 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Shares approved by Shareholders (Shares Available for Grant)	5,000	5,000
Number Outstanding (in shares)	4,692	6,400	7,297	6,520
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)	4,085	4,612	830	2,016
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	5 years
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period	10 years
Pre-tax unrecognized compensation expense related to nonvested stock options	$ 28.4
Pre-tax unrecognized compensation expense related to nonvested stock options, expected to be recognized over a weighted average period (in years)	3 years 2 months 12 days
Fair value of stock options, Vested	$ 8.9	$ 8.5	$ 5.3
Common Class A [Member]
Number Outstanding (in shares)	3,010
Stock Option and Future Grants [Member]
Shares approved by Shareholders (Shares Available for Grant)	8,800
Number Outstanding (in shares)	4,700
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)	4,100
Share-based Payment Arrangement, Option [Member]
Share-based Payment Arrangement, Expense	$ 10.3	9.3	7.4
Share-based Payment Arrangement, Expense, Tax Benefit	$ 2.0	$ 2.2	$ 2.8

EMPLOYEE RETIREMENT PLANS EMPLOYEE RETIREMENT PLANS, Defined Contribution Plan Share-based Activity (Details) - shares shares in Thousands	12 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Defined Contribution Plan Disclosure [Line Items]
Shares available for issuance, Opening Balance	333	398	491
Issuance of common stock to 401(k) Plan	(53)	(65)	(93)
Shares available for issuance, Ending Balance	280	333	398
Common Class A [Member]
Defined Contribution Plan Disclosure [Line Items]
Shares available for issuance, Opening Balance	333	398	491
Issuance of common stock to 401(k) Plan		(65)	(93)
Shares available for issuance, Ending Balance		333	398

EMPLOYEE RETIREMENT PLANS (Details Textuals) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	6.00%
Defined contribution plan partcipants employees range maximum	6.00%
Defined contribution plan, vesting of employee contribution and cash dividends, percent	100.00%
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 9.5	$ 8.0	$ 7.8
Maximum [Member]
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	50.00%

REDEEMABLE NONCONTROLLING INTERESTS REDEEMABLE NONCONTROLLING INTERESTS (Aggregate Redemption Amount) (Details) - USD ($) $ in Thousands	Oct. 31, 2019	Nov. 01, 2018	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2016
Aggregate Redemption Amount Estimate [Line Items]
Redeemable Noncontrolling Interest, Equity, Fair Value	$ 136,611		$ 83,524
Noncontrolling Interest, Change in Redemption Value	51,653		48,522
Redeemable Noncontrolling Interest, Equity, Carrying Amount	$ 188,264	$ 132,865	$ 132,046	$ 131,123	$ 99,512

REDEEMABLE NONCONTROLLING INTERESTS (Put Rights) (Details)

12 Months Ended

Oct. 31, 2019

Electronic Technologies Group [Member] | Subsidiary One [Member]

Business Acquisition [Line Items]

Effective Date of Acquisition

Oct. 31, 2005

Percentage of interest acquired in the subsidiary

95.90%

Class of Warrant or Right, Date from which Warrants or Rights Exercisable

Oct. 31, 2020

^[1]

Put Rights Purchase Period

4 years

^[2]

Electronic Technologies Group [Member] | Subsidiary Four [Member]

Business Acquisition [Line Items]

Effective Date of Acquisition

Oct. 31, 2009

Percentage of interest acquired in the subsidiary

82.50%

Class of Warrant or Right, Date from which Warrants or Rights Exercisable

Oct. 31, 2020

^[1]

Put Rights Purchase Period

1 year

Electronic Technologies Group [Member] | Subsidiary Five [Member]

Business Acquisition [Line Items]

Effective Date of Acquisition

Oct. 31, 2012

Percentage of interest acquired in the subsidiary

78.00%

Class of Warrant or Right, Date from which Warrants or Rights Exercisable

Oct. 31, 2020

^[1]

Put Rights Purchase Period

2 years

Electronic Technologies Group [Member] | Subsidiary Ten [Member]

Business Acquisition [Line Items]

Effective Date of Acquisition

Oct. 31, 2015

Percentage of interest acquired in the subsidiary

80.10%

Class of Warrant or Right, Date from which Warrants or Rights Exercisable

Oct. 31, 2020

Put Rights Purchase Period

2 years

Electronic Technologies Group [Member] | Subsidiary Thirteen [Member]

Business Acquisition [Line Items]

Effective Date of Acquisition

Oct. 31, 2018

Percentage of interest acquired in the subsidiary

85.00%

Class of Warrant or Right, Date from which Warrants or Rights Exercisable

Oct. 31, 2021

Put Rights Purchase Period

1 year

Electronic Technologies Group [Member] | Subsidiary Fourteen [Member]

Business Acquisition [Line Items]

Effective Date of Acquisition

Oct. 31, 2019

Percentage of interest acquired in the subsidiary

92.70%

Class of Warrant or Right, Date from which Warrants or Rights Exercisable

Oct. 31, 2023

Put Rights Purchase Period

4 years

Electronic Technologies Group [Member] | Subsidiary Fifteen [Member]

Business Acquisition [Line Items]

Effective Date of Acquisition

Oct. 31, 2019

Percentage of interest acquired in the subsidiary

85.00%

Class of Warrant or Right, Date from which Warrants or Rights Exercisable

Oct. 31, 2024

Put Rights Purchase Period

4 years

Electronic Technologies Group [Member] | Subsidiary Seventeen [Member]

Business Acquisition [Line Items]

Effective Date of Acquisition

Oct. 31, 2019

Percentage of interest acquired in the subsidiary

75.00%

Class of Warrant or Right, Date from which Warrants or Rights Exercisable

Oct. 31, 2024

Put Rights Purchase Period

4 years

Flight Support Group [Member] | Subsidiary Two [Member]

Business Acquisition [Line Items]

Effective Date of Acquisition

Oct. 31, 2006

Percentage of interest acquired in the subsidiary

80.10%

Class of Warrant or Right, Date from which Warrants or Rights Exercisable

Oct. 31, 2020

^[1]

Put Rights Purchase Period

4 years

Flight Support Group [Member] | Subsidiary Three [Member]

Business Acquisition [Line Items]

Effective Date of Acquisition

Oct. 31, 2008

Percentage of interest acquired in the subsidiary

82.30%

Class of Warrant or Right, Date from which Warrants or Rights Exercisable

Oct. 31, 2020

^[1]

Put Rights Purchase Period

5 years

Flight Support Group [Member] | Subsidiary Six [Member]

Business Acquisition [Line Items]

Effective Date of Acquisition

Oct. 31, 2012

Percentage of interest acquired in the subsidiary

84.00%

Class of Warrant or Right, Date from which Warrants or Rights Exercisable

Oct. 31, 2020

^[1]

Put Rights Purchase Period

4 years

Flight Support Group [Member] | Subsidiary Seven [Member]

Business Acquisition [Line Items]

Effective Date of Acquisition

Oct. 31, 2012

Percentage of interest acquired in the subsidiary

80.10%

Class of Warrant or Right, Date from which Warrants or Rights Exercisable

Oct. 31, 2020

^[1]

Put Rights Purchase Period

4 years

Flight Support Group [Member] | Subsidiary Eight [Member]

Business Acquisition [Line Items]

Effective Date of Acquisition

Oct. 31, 2015

Percentage of interest acquired in the subsidiary

80.00%

Class of Warrant or Right, Date from which Warrants or Rights Exercisable

Oct. 31, 2020

^[1]

Put Rights Purchase Period

4 years

Flight Support Group [Member] | Subsidiary Nine [Member]

Business Acquisition [Line Items]

Effective Date of Acquisition

Oct. 31, 2015

Percentage of interest acquired in the subsidiary

80.10%

Class of Warrant or Right, Date from which Warrants or Rights Exercisable

Oct. 31, 2020

Put Rights Purchase Period

4 years

Flight Support Group [Member] | Subsidiary Eleven [Member]

Business Acquisition [Line Items]

Effective Date of Acquisition

Oct. 31, 2015

Percentage of interest acquired in the subsidiary

80.10%

Class of Warrant or Right, Date from which Warrants or Rights Exercisable

Oct. 31, 2022

Put Rights Purchase Period

4 years

Flight Support Group [Member] | Subsidiary Twelve [Member]

Business Acquisition [Line Items]

Effective Date of Acquisition

Oct. 31, 2017

Percentage of interest acquired in the subsidiary

80.10%

Class of Warrant or Right, Date from which Warrants or Rights Exercisable

Oct. 31, 2022

Put Rights Purchase Period

2 years

^[3]

Flight Support Group [Member] | Subsidiary Sixteen [Member]

Business Acquisition [Line Items]

Effective Date of Acquisition

Oct. 31, 2019

Percentage of interest acquired in the subsidiary

80.10%

Class of Warrant or Right, Date from which Warrants or Rights Exercisable

Oct. 31, 2026

Put Rights Purchase Period

4 years

[1]	(1) Currently puttable
[2]	(2) A portion is to be purchased in a lump sum
[3]	(3) The second purchase is to be made two years after the first Put Right Year

REDEEMABLE NONCONTROLLING INTERESTS (Details Textuals) $ in Millions	Oct. 31, 2019 USD ($)
Temporary Equity Disclosure [Abstract]
Aggregate Redemption Amount Puttable	$ 106.7
Potential Redemption Amount Payable	$ 47.8

NET INCOME PER SHARE ATTRIBUTABLE TO HEICO SHAREHOLDERS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Oct. 31, 2019	Jul. 31, 2019	Apr. 30, 2019	Jan. 31, 2019	Oct. 31, 2018	Jul. 31, 2018	Apr. 30, 2018	Jan. 31, 2018	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Numerator:
Net income attributable to HEICO	$ 85,684	$ 81,098	$ 81,782	$ 79,332	$ 67,377	$ 67,086	$ 59,618	$ 65,152	$ 327,896	$ 259,233	$ 185,985
Denominator:
Weighted average common shares outstanding - basic									133,640	132,543	131,703
Effect of dilutive stock options									3,710	4,153	3,885
Weighted Average Number of Shares Outstanding, Diluted									137,350	136,696	135,588
Earnings Per Share, Basic	$ 0.64	$ 0.61	$ 0.61	$ 0.60	$ 0.51	$ 0.51	$ 0.45	$ 0.49	$ 2.45	$ 1.96	$ 1.41
Earnings Per Share, Diluted	$ 0.62	$ 0.59	$ 0.60	$ 0.58	$ 0.49	$ 0.49	$ 0.44	$ 0.48	$ 2.39	$ 1.90	$ 1.37
Anti-dilutive stock options excluded									330	512	799

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

+ References

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+ Details

- Definition

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

+ References

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+ Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References + Details

QUARTERLY FINANCIAL INFORMATION (UNAUDITED) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Oct. 31, 2019	Jul. 31, 2019	Apr. 30, 2019	Jan. 31, 2019	Oct. 31, 2018	Jul. 31, 2018	Apr. 30, 2018	Jan. 31, 2018	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Net sales:
Net sales	$ 541,529	$ 532,324	$ 515,648	$ 466,146	$ 476,884	$ 465,825	$ 430,602	$ 404,410	$ 2,055,647	$ 1,777,721	$ 1,524,813
Gross profit:
Gross profit	209,385	212,831	209,387	182,237	186,458	181,609	167,857	154,791
Net income from consolidated operations:
Net income from consolidated operations	92,573	89,059	90,083	88,026	74,081	73,899	66,011	71,695	359,741	285,686	207,660
Net income attributable to HEICO:
Net income attributable to HEICO	$ 85,684	$ 81,098	$ 81,782	$ 79,332	$ 67,377	$ 67,086	$ 59,618	$ 65,152	$ 327,896	$ 259,233	$ 185,985
Basic:
Basic (in dollars per share)	$ 0.64	$ 0.61	$ 0.61	$ 0.60	$ 0.51	$ 0.51	$ 0.45	$ 0.49	$ 2.45	$ 1.96	$ 1.41
Diluted:
Diluted (in dollars per share)	$ 0.62	$ 0.59	$ 0.60	$ 0.58	$ 0.49	$ 0.49	$ 0.44	$ 0.48	$ 2.39	$ 1.90	$ 1.37

QUARTERLY FINANCIAL INFORMATION (UNAUDITED) (Details Textuals) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		12 Months Ended
	Jan. 31, 2019	Jan. 31, 2018	Oct. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Deferred Tax Expense from Stock Options Exercised	$ 16.6
Transition Tax Expense from Unremitted Earnings from Foreign Subsidiaries		$ 11.9	$ 4.4
Remeasurement of Deferred Tax Liabilities for Change in Tax Rate, Net, Per Share		$ 0.09
Net income attributable to HEICO	$ 15.1	$ 2.1
Earnings Per Share, Basic	$ 0.11	$ 0.02

OPERATING SEGMENTS (Last three years, segment information) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Oct. 31, 2019	Jul. 31, 2019	Apr. 30, 2019	Jan. 31, 2019	Oct. 31, 2018	Jul. 31, 2018	Apr. 30, 2018	Jan. 31, 2018	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Segment Reporting, Reconciling Item For Operating Profit (Loss) and Capital Expenditure From Segment To Consolidated [Line Items]
Net sales	$ 541,529	$ 532,324	$ 515,648	$ 466,146	$ 476,884	$ 465,825	$ 430,602	$ 404,410	$ 2,055,647	$ 1,777,721	$ 1,524,813
Depreciation									25,758	23,239	21,878
Amortization									57,739	53,952	42,945
Operating income									457,097	376,245	306,658
Capital expenditures									28,938	41,871	25,998
Flight Support Group [Member]
Segment Reporting, Reconciling Item For Operating Profit (Loss) and Capital Expenditure From Segment To Consolidated [Line Items]
Net sales									1,240,183	1,097,937	967,540
Depreciation									13,793	13,322	13,042
Amortization									19,624	19,530	18,026
Operating income									242,029	206,623	179,278
Capital expenditures									17,036	13,074	15,665
Electronic Technologies Group [Member]
Segment Reporting, Reconciling Item For Operating Profit (Loss) and Capital Expenditure From Segment To Consolidated [Line Items]
Net sales									834,522	701,827	574,261
Depreciation									10,957	9,225	8,609
Amortization									37,131	33,339	24,167
Operating income									245,743	204,508	157,451
Capital expenditures									11,826	9,531	10,100
Other Primarily Corporate and Inter Segment [Member]
Segment Reporting, Reconciling Item For Operating Profit (Loss) and Capital Expenditure From Segment To Consolidated [Line Items]
Depreciation									1,008	692	227
Amortization									984	1,083	752
Operating income									(30,675)	(34,886)	(30,071)
Capital expenditures									76	19,266	233
Consolidation, Eliminations [Member] \| Other Primarily Corporate and Inter Segment [Member]
Segment Reporting, Reconciling Item For Operating Profit (Loss) and Capital Expenditure From Segment To Consolidated [Line Items]
Net sales									$ (19,058)	$ (22,043)	$ (16,988)

OPERATING SEGMENTS OPERATING SEGMENTS (Total assets) (Details) - USD ($) $ in Thousands	Oct. 31, 2019	Oct. 31, 2018
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 2,969,211	$ 2,653,396
Operating Segments [Member] \| Flight Support Group [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	1,149,737	1,093,858
Operating Segments [Member] \| Electronic Technologies Group [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	1,643,032	1,391,997
Corporate And Eliminations [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 176,442	$ 167,541

OPERATING SEGMENTS (Geographical information) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Oct. 31, 2019	Jul. 31, 2019	Apr. 30, 2019	Jan. 31, 2019	Oct. 31, 2018	Jul. 31, 2018	Apr. 30, 2018	Jan. 31, 2018	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 541,529	$ 532,324	$ 515,648	$ 466,146	$ 476,884	$ 465,825	$ 430,602	$ 404,410	$ 2,055,647	$ 1,777,721	$ 1,524,813
Property, Plant and Equipment, Net	173,345				154,739				173,345	154,739	129,883
North America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									1,308,943	1,127,998	1,007,491
Property, Plant and Equipment, Net	143,350				124,225				143,350	124,225	97,367
Other Countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									746,704	649,723	517,322
Property, Plant and Equipment, Net	$ 29,995				$ 30,514				$ 29,995	$ 30,514	$ 32,516

COMMITMENTS AND CONTINGENCIES (Lease commitments) (Details) $ in Thousands	Oct. 31, 2019 USD ($)
Year One	$ 15,508
Year Two	15,563
Year Three	13,808
Year Four	8,515
Year Five	4,741
Thereafter	18,812
Total minimum lease commitments	$ 76,947

COMMITMENTS AND CONTINGENCIES (Product warranty) (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2019	Oct. 31, 2018
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Balances as of beginning of year	$ 3,306	$ 2,921
Accruals for warranties	2,061	2,720
Acquired warranty liabilities	0	320
Warranty claims settled	(2,557)	(2,655)
Balances as of end of year	$ 2,810	$ 3,306

COMMITMENTS AND CONTINGENCIES (Details Textuals) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Total rent expense charged to operations for operating leases	$ 20.0	$ 17.5	$ 15.6
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 4.1

SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Cash paid for income taxes	$ 82,211	$ 90,488	$ 95,851
Cash received from income tax refunds	(578)	(1,510)	(2,953)
Cash paid for interest	22,158	19,233	9,631
Additional purchase consideration			220
Additional purchase consideration	0	(407)
Property, plant and equipment acquired through capital lease obligations	84	7,166	37
Other Acquisitions [Member]
Contingent purchase consideration	$ (2,107)	$ 0	$ (13,797)

SUBSEQUENT EVENT SUBSEQUENT EVENT (Details Textual) - Subsequent Event [Member] - Quell [Member]	1 Months Ended
	Dec. 31, 2019	Dec. 01, 2019
Electronic Technologies Group [Member]
Subsequent Event [Line Items]
Subsequent Event, Date	Dec. 01, 2019
Percentage of interest acquired in the subsidiary		80.10%
Name of Acquired Entity	Quell Corporation
Description of Acquired Entity	Quell designs and manufactures electromagnetic interference (EMI)/radio-frequency interference (RFI) and transient protection solutions for a wide variety of connectors that principally serve customers within the aerospace and defense markets.
Existing Management [Member]
Subsequent Event [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners		19.90%

VALUATION AND QUALIFYING ACCOUNTS VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($)
$ in Thousands

12 Months Ended

Oct. 31, 2019

Oct. 31, 2018

Oct. 31, 2017

SEC Schedule, 12-09, Allowance, Credit Loss [Member]

SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]

Valuation Allowances and Reserves, Opening Balance

$ 3,258

$ 3,006

$ 3,159

Valuation Allowances and Reserves, Charged to Cost and Expense

638

492

SEC Schedule, 12-09, Valuation Allowances and Reserves, Addition, Recovery

^[1]

Valuation Allowances and Reserves, Charged to Other Accounts

^[1]

(13)

298

SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction

^[2]

(240)

(227)

(458)

Valuation Allowances and Reserves, Ending Balance

3,666

3,258

3,006

SEC Schedule, 12-09, Reserve, Inventory [Member]

SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]

Valuation Allowances and Reserves, Opening Balance

95,391

92,148

81,449

Valuation Allowances and Reserves, Charged to Cost and Expense

10,148

9,227

6,284

Valuation Allowances and Reserves, Charged to Other Accounts

^[3]

1,885

1,270

6,264

SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction

^[4]

(3,603)

(7,254)

(1,849)

Valuation Allowances and Reserves, Ending Balance

$ 103,821

$ 95,391

$ 92,148

[1]	(a) Principally additions from acquisitions and foreign currency translation adjustments.
[2]	(b) Principally write-offs of uncollectible accounts receivable.
[3]	(a) Principally additions from acquisitions and foreign currency translation adjustments
[4]	(b) Principally write-offs of slow-moving, obsolete or damaged inventory

Buildings and improvements

Machinery and equipment

Leasehold improvements