v3.4.0.3
DOCUMENT AND ENTITY INFORMATION - $ / shares
6 Months Ended
Apr. 30, 2016
May. 26, 2016
Document Information [Line Items]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Apr. 30, 2016  
Document Fiscal Period Focus Q2  
Document Fiscal Year Focus 2016  
Entity Information [Line Items]    
Entity Registrant Name HEICO CORPORATION  
Address 3000 Taft Street, Hollywood, Florida  
State Florida  
Zip Code 33021  
Entity Central Index Key 0000046619  
Entity Tax Identification Number 650341002  
Current Fiscal Year End Date --10-31  
Entity Filer Category Large Accelerated Filer  
Trading Symbol hei  
Heico Common Stock [Member]    
Entity Information [Line Items]    
Entity Common Stock, Shares Outstanding   26,955,392
Entity Common Stock Par Value $ 0.01  
Common Class A [Member]    
Entity Information [Line Items]    
Entity Common Stock, Shares Outstanding   40,105,660
Entity Common Stock Par Value $ 0.01