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Weighted average number of common shares outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Contract assets Contract with Customer, Asset, before Allowance for Credit Loss, Current Contract with Customer, Asset, before Allowance for Credit Loss, Current Maximum [Member] Maximum [Member] Statistical Measurement [Domain] Statistical Measurement [Domain] Title of 12(b) Security Title of 12(b) Security Subsequent Event Subsequent Event [Member] Document Fiscal Year Focus Document Fiscal Year Focus Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Weighted average interest rate Debt, Weighted Average Interest Rate Schedule of Product Warranties [Table] Schedule of Product Warranties [Table] Schedule of Product Warranties [Table] Finite-Lived Customer Relationships, Gross Finite-Lived Customer Relationships, Gross Customer [Axis] Customer [Axis] Segment Reporting [Abstract] Segment Reporting [Abstract] Common Stock Common Stock, Value, Issued Schedule of Long-term Debt Instruments [Table Text Block] Schedule of Long-Term Debt Instruments [Table Text Block] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Period Increase (Decrease) Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Period Increase (Decrease) Guarantor Obligations, Maximum Exposure, Undiscounted Guarantor Obligations, Maximum Exposure, Undiscounted Amendment Flag Amendment Flag Consolidated Entities [Axis] Consolidated Entities [Axis] Goodwill [Line Items] Goodwill [Line Items] Schedule of Fair Value of Total Consideration Schedule of Fair Value of Total Consideration [Table Text Block] Schedule of the fair value of total consideration associated with the acquisition as of the acquisition date. 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Selected Financial Statement Information [Abstract] Selected Financial Statement Information [Abstract] Debt Instrument, Interest Rate, Stated Percentage Debt Instrument, Interest Rate, Stated Percentage Cash dividends Dividends, Common Stock, Cash Total HEICO shareholders' equity Equity, Attributable to Parent Aftermarket Replacement Parts [Member] Aftermarket Replacement Parts [Member] Aftermarket Replacement Parts [Member] Business Combination, Recognized Asset Acquired, Other Asset, Noncurrent Business Combination, Recognized Asset Acquired, Other Asset, Noncurrent Proceeds from stock option exercises, Adjustment to Additional Paid in Capital APIC, Share-Based Payment Arrangement, Option, Increase for Cost Recognition ASSETS Assets Assets [Abstract] Accounting Policies [Abstract] Accounting Policies [Abstract] Adjustments to goodwill Goodwill, Measurement Period Adjustment Less: Allowance for doubtful accounts Accounts Receivable, Allowance for Credit Loss, Current Other Proceeds from (Payment for) Other Financing Activity Accrued Expenses Assumed Accrued Expenses Assumed Amount of accrued expenses assumed at the acquisition date. Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Deferred income tax provision (benefit) Deferred Income Tax Expense (Benefit) Selling, general and administrative expenses Selling, General and Administrative Expense Business Combination, Name of Acquiree Business Combination, Name of Acquiree Business Combination [Domain] Business Combination [Domain] Tax benefit from stock option exercises recognized in the period Deferred Tax Expense from Stock Options Exercised Commitments and Contingencies Disclosure [Text Block] Commitments and Contingencies Disclosure [Text Block] Schedule of Earnings Per Share, Basic and Diluted [Table] Schedule of Earnings Per Share, Basic and Diluted [Table] Schedule of Earnings Per Share, Basic and 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[Abstract] Income Statement [Abstract] Shareholders' equity: Equity, Attributable to Parent [Abstract] Document Transition Report Document Transition Report Business Combination, Contingent Consideration, Liability [Abstract] Business Combination, Contingent Consideration, Liability [Abstract] Ownership [Axis] Ownership [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Intersegment Eliminations Intersegment Eliminations [Member] Deferred Compensation Obligation [Member] Deferred Compensation Obligation [Member] Repair and Overhaul Parts and Services [Member] Repair and Overhaul Parts and Services [Member] Repair and Overhaul Parts and Services [Member] City Area Code City Area Code AOCI Attributable to Parent [Member] AOCI Attributable to Parent [Member] Document Information [Table] Document Information [Table] Subsequent Events Subsequent Events [Text Block] Corporate Segment Corporate Segment [Member] Net Investment 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[Roll Forward] Common stock, shares outstanding Common Stock, Shares, Outstanding Foreign Currency Translation [Member] Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Diluted (in dollars per share) Earnings Per Share, Diluted Earnings Per Share, Diluted Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Entity Current Reporting Status Entity Current Reporting Status Net cash (used in) provided by financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Change in prepaid expenses and other current assets Increase (Decrease) in Prepaid Expense and Other Assets Redemptions of common stock related to stock option exercises Stock Redeemed or Called During Period, Value Redeemable Noncontrolling Interests [Member] Redeemable Noncontrolling Interests [Member] Amortization expense related to intangible assets Intangible Asset, Finite-Lived, Amortization Expense Inventory [Domain] Inventory [Domain] Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax Ownership [Domain] Ownership [Domain] R&D expenses Research and Development Expense Borrowings on revolving credit facility Proceeds from Long-Term Lines of Credit Adjustments to reconcile net income from consolidated operations to net cash provided by (used in) operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Electronic Components for Defense, Space and Aerospace [Member] Electronic Components for Defense, Space and Aerospace [Member] Electronic Components for Defense, Space and Aerospace [Member] Business Combination, Recognized Asset Acquired, Asset Business Combination, Recognized Asset Acquired, Asset Deferred Compensation Liability, Classified, Noncurrent Deferred Compensation Liability, Classified, Noncurrent Revenue from Contract with Customer, Excluding Assessed Tax Revenue from Contract with Customer, Excluding Assessed Tax Financing Activities: Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Property, plant and equipment, net Property, plant and equipment, net Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization Indefinite-Lived Trade Names Indefinite-Lived Trade Names Finite-Lived Intellectual Property, Gross Finite-Lived Intellectual Property, Gross Gross carrying amount before accumulated amortization as of the balance sheet date of capitalized intellectual property having a finite beneficial life. 2028 Senior Notes 2028 Senior Notes [Member] 2028 Senior Notes Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value Intangible Asset, 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[Member] Customers within the Defense and Space industries [Member] Distributions to noncontrolling interests Distributions to noncontrolling interests Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Senior Notes Senior Notes Common stock, shares issued Common Stock, Shares, Issued Entity Information [Line Items] Entity Information [Line Items] Equity Components [Axis] Equity Components [Axis] Share-based compensation expense Stock or Unit Option Plan Expense Product and Service [Domain] Product and Service [Domain] Acquired Finite Lived and Indefinite Lived Intangible Assets [Line Items] Acquired Finite Lived and Indefinite Lived Intangible Assets [Line Items] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Common Class A [Member] Class A Common Stock [Member] Common Class A [Member] Entity Interactive Data Current Entity Interactive Data Current Less: Net income attributable to noncontrolling interests Less: Comprehensive 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Payments to Acquire Businesses, Net of Cash Acquired Payments to Acquire Businesses, Net of Cash Acquired Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Accrued expenses and other current liabilities Accrued Liabilities, Current Summary of Significant Accounting Policies [Text Block] Significant Accounting Policies [Text Block] Schedule of Goodwill [Table] Goodwill [Table] Increase (Decrease) in Temporary Equity [Roll Forward] Increase (Decrease) in Temporary Equity [Roll Forward] Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax Subsequent Event [Line Items] Subsequent Event [Line Items] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Local Phone Number Local Phone Number Contract with Customer, Liability, Noncurrent Contract with Customer, Liability, Noncurrent Selected Financial Statement Information (Details) [Abstract] Selected Financial Statement Information (Details) [Abstract] Selected Financial Statement Information (Details) [Abstract] Selected Financial Statement Information [Text Block] Additional Financial Information Disclosure [Text Block] Payment for Contingent Consideration Liability, Operating Activities Payment for Contingent Consideration Liability, Operating Activities Consolidation Items [Axis] Consolidation Items [Axis] Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Income before income taxes and noncontrolling interests Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Commitments and contingencies Commitments and Contingencies Intangible Asset, Finite-Lived, before Accumulated Amortization Intangible Asset, Finite-Lived, before Accumulated Amortization Net sales Revenues Revenues Property, plant and equipment, gross Property, Plant, and Equipment, before Accumulated Depreciation, Depletion, and Amortization Estimated Amortization Expense, for next four fiscal year Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Four Accounting Standards Update and Change in Accounting Principle [Table] Accounting Standards Update and Change in Accounting Principle [Table] LIABILITIES AND EQUITY Liabilities and Equity [Abstract] Intangible Asset, Finite-Lived, Class [Domain] Intangible Asset, Finite-Lived, Class [Domain] Trade Names Trade Names [Member] Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Inventories, net Inventory, Net Fair Value Disclosures [Text Block] Fair Value Disclosures [Text Block] Balances as of beginning of fiscal year Balances as of end of period Standard and Extended Product Warranty Accrual Significant Unobservable Inputs (Level 3) [Member] Fair Value, Inputs, Level 3 [Member] Fair Value, Inputs, Level 3 [Member] FY 2026 Acquisitions FY 2026 Acquisitions [Member] FY 2026 Acquisitions Estimated Amortization Expense, for next one fiscal year Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year One Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners Subsidiary, Ownership Percentage, Noncontrolling Owner Document Information, Document [Axis] Document Information, Document [Axis] Change in accrued expenses and other current liabilities Increase (Decrease) in Accrued Liabilities Contract with Customer, Liability Contract with Customer, Liability Other Segment Item Segment Reporting, Other Segment Item, Amount Property, Plant and Equipment, Type [Axis] Long-Lived Asset, Class [Axis] Cash Acquired from Acquisition Cash Acquired from Acquisition Payment for Contingent Consideration Liability, Financing Activities Payment for Contingent Consideration Liability, Financing Activities Entity Tax Identification Number Entity Tax Identification Number Business Combination, Contingent Consideration, Liability, Measurement Input Business Combination, Contingent Consideration, Liability, Measurement Input Legal Entity [Axis] Legal Entity [Axis] Interest expense Interest Expense, Debt REVENUE [Abstract] REVENUE [Abstract] REVENUE [Abstract] Business Combination, Recognized Asset Acquired, Asset [Abstract] Business Combination, Recognized Asset Acquired, Asset [Abstract] Cash and cash equivalents at beginning of year Cash and cash equivalents at end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Change in trade accounts payable Increase (Decrease) in Accounts Payable Warranty claims settled Standard and Extended Product Warranty Accrual, Decrease for Payments Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases Deferred Compensation Plan, Asset Categories [Domain] Deferred Compensation Plan, Asset Categories [Domain] Deferred Compensation Plan, Asset Categories [Domain] Basis of Presentation [Text Block] Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Comprehensive income from consolidated operations Comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Numerator: Numerator [Abstract] Numerator. Subsequent Event [Table] Subsequent Event [Table] Business Combination, Recognized Liability Assumed, Other Liability, Noncurrent Business Combination, Recognized Liability Assumed, Other Liability, Noncurrent Payments to Acquire Businesses, Gross Payments to Acquire Businesses, Gross Estimated Amortization Expense, for next two fiscal year Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Two Land Land Customer [Domain] Customer [Domain] Schedule of Inventories [Table Text Block] Schedule of Inventory, Current [Table Text Block] Long-Term Debt, Type [Domain] Long-Term Debt, Type [Domain] Basic (in dollars per share) Earnings Per Share, Basic Earnings Per Share, Basic Measurement Input Type [Axis] Measurement Input Type [Axis] Heico Electronic Technologies Corp Heico Electronic Technologies Corp [Member] Heico Electronic Technologies Corp Intellectual Property [Member] Intellectual Property [Member] Contract with Customer, Liability, Current Contract with Customer, Liability, Current Additional Purchase Consideration Due to Heico Additional Purchase Consideration Due to Heico Additional Purchase Consideration Due to Heico Total current assets Assets, Current Statistical Measurement [Axis] Statistical Measurement [Axis] Cost of sales Cost of Revenue Cost of Revenue Accounts receivable, net Accounts Receivable, after Allowance for Credit Loss, Current Retained earnings Retained Earnings (Accumulated Deficit) Senior Notes [Abstract] Senior Notes [Abstract] Product and Service [Axis] Product and Service [Axis] Deferred Compensation Plans [Abstract] Deferred Compensation Plans [Abstract] Deferred Compensation Plans [Abstract] Total customer rebates and credits deducted within net sales Accrued Customer Rebates and Credits Expense The total customer rebates and credits expense deducted within net sales. Change in value of contingent consideration Business Combination, Contingent Consideration, Change in Contingent Consideration, Liability, Increase (Decrease) Redeemable noncontrolling interests Starting Balance, Redeemable Noncontrolling Interests Ending Balance, Redeemable Noncontrolling Interests Redeemable noncontrolling interests Temporary Equity, Including Noncontrolling Interest FY2022 Acquisition Subsidiary 1 FY2022 Acquisition Subsidiary 1 [Member] FY2022 Acquisition Subsidiary 1 Common Stock [Member] Common Stock [Member] Contingent consideration Contingent consideration Total liabilities Business Combination, Contingent Consideration, Liability Cover [Abstract] Cover [Abstract] Fair Value Measurement Inputs and Valuation Techniques [Table] Fair Value Measurement Inputs and Valuation Techniques [Table] Redeemable based on a multiple of future earnings Redeemable Noncontrolling Interest, Equity, Fair Value Foreign currency translation adjustments Goodwill, Foreign Currency Translation, Gain (Loss) Accounting Standards Update [Domain] Accounting Standards Update [Domain] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Total liabilities and equity Liabilities and Equity Sales by Industry [Member] Sales by Industry [Member] Sales by Industry [Member] Debt, Current Debt, Current Noncontrolling interests Equity, Attributable to Noncontrolling Interest Statement, Business Segments [Axis] Segments [Axis] Segments [Axis] Schedule of Accounts Receivable [Table Text Block] Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Schedule Of Acquired Finite and Indefinite Lived Intangible Assets By Major Class [Table] Schedule Of Acquired Finite and Indefinite Lived Intangible Assets By Major Class [Table] Rockmart Rockmart [Member] Rockmart Fuel Containment FY2022 Acquisition Subsidiary 2 FY2022 Acquisition Subsidiary 2 [Member] FY2022 Acquisition Subsidiary 2 Other (expense) income Other Nonoperating Income (Expense) Flight Support Group [Member] Flight Support Group [Member] Flight Support Group. Long-term Debt [Text Block] Long-Term Debt [Text Block] Estimated Amortization Expense, for next five fiscal year Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Five Estimated Amortization Expense, for next three fiscal year Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Three Estimated Amortization Expense, remainder of fiscal year Intangible Asset, Finite-Lived, Estimated Amortization Expense, Remainder of Fiscal Year Shareholders' equity: Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Less: Foreign currency translation adjustments attributable to noncontrolling interests Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Noncontrolling Interest Schedule of Redeemable Noncontrolling Interests [Table Text Block] Redeemable Noncontrolling Interest [Table Text Block] Property, Plant and Equipment, Type [Domain] Long-Lived Asset, Class [Domain] Preferred Stock, Shares Authorized Preferred Stock, Shares Authorized FY 2023 Acquisition FY 2023 Acquisition [Member] FY 2023 Acquisition Accounts receivable, net Receivables, Net, Current Property, Plant, and Equipment [Table] Property, Plant, and Equipment [Table] Preferred Stock, $.01 par value per share; 10,000 shares authorized; none issued Preferred Stock, Value, Issued Defined Benefit Plan, Liability Categories [Axis] Defined Benefit Plan, Liability Categories [Axis] Defined Benefit Plan, Liability Categories [Axis] Class of Stock [Domain] Class of Stock [Domain] Class of Stock [Domain] Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Acquisitions of noncontrolling interests, RNCI Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests Inventory [Line Items] Inventory [Line Items] Credit Facility [Axis] Credit Facility [Axis] Heico Corporation Heico Corporation [Member] Heico Corporation Long-term debt, net of current maturities Long-Term Debt and Lease Obligation Income Tax Disclosure [Text Block] Income Tax Disclosure [Text Block] Trade accounts payable Accounts Payable, Current Fair Value Hierarchy and NAV [Domain] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value Hierarchy and NAV [Domain] Other Other Noncash Income (Expense) Noncontrolling interests assumed related to acquisitions Noncontrolling Interest, Increase from Business Combination Debt Instrument [Line Items] Debt Instrument [Line Items] Debt Instrument [Line Items] Business Combination, Consideration Transferred Business Combination, Consideration Transferred Capital In Excess Of Par Value [Member] Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Intangible Asset, Indefinite-Lived, Class [Axis] Intangible Asset, Indefinite-Lived, Class [Axis] Cash and cash equivalents Cash and Cash Equivalent Other Industries [Member] Other Industries [Member] Customers within other industries [Member] Sherwood Sherwood [Member] Sherwood Avionics and Accessories, Inc. HEICO Stock Held By Irrevocable Trust [Member] HEICO Stock Held By Irrevocable Trust [Member] HEICO stock held by irrevocable trust. Depreciation and amortization Depreciation, Depletion and Amortization Debt Instrument, Payment Terms Debt Instrument, Payment Terms Schedule of Accounts Receivable [Table] Accounts and Financing Receivables [Table] Net income from consolidated operations Net income from consolidated operations Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Temporary Equity, Other Changes Temporary Equity, Other Changes Current assets: Assets, Current [Abstract] Business Combination, Pro Forma Information, Pro Forma Revenue Business Combination, Pro Forma Information, Pro Forma Revenue Address Entity Address, Address Line One Income tax expense Income Tax Expense (Benefit) Net (decrease) increase in cash and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Forecast Forecast [Member] Business Combination, Contingent Consideration, Range of Outcomes, Maximum, Amount Business Combination, Contingent Consideration, Range of Outcomes, Maximum, Amount Electronic Technologies Group [Member] Electronic Technologies Group [Member] Electronic Technologies Group. Business Combination, Recognized Liability Assumed, Deferred Tax Liability Business Combination, Recognized Liability Assumed, Deferred Tax Liability Net income attributable to HEICO Net income attributable to HEICO Net Income (Loss) Attributable to Parent Long-Term Debt, Type [Axis] Long-Term Debt, Type [Axis] Product Line [Member] Product Line [Member] Product Line [Member] Heico Common Stock [Member] Heico Common Stock [Member] Heico Common Stock [Member] Statement [Table] Statement [Table] Statement [Table] Proceeds from stock option exercises Proceeds from Stock Options Exercised Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Noncontrolling Interest Decrease Adjustment From Business Acquisition Noncontrolling Interest Decrease Adjustment From Business Acquisition Noncontrolling Interest Decrease Adjustment From Business Acquisition Product Warranty Liability [Domain] Product Warranty Liability [Domain] [Domain] for Product Warranty Liability [Axis] Business Combination, Recognized Liability Assumed, Liability [Abstract] Business Combination, Recognized Liability Assumed, Liability [Abstract] Total Shareholders Equity [Member] Total Shareholders Equity [Member] Total Shareholders Equity, not including Redeemable Noncontrolling Interests Contract with Customer, Asset and Liability [Table Text Block] Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Change in accounts receivable Increase (Decrease) in Receivables Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table]