DOCUMENT AND ENTITY INFORMATION In Thousands, unless otherwise specified	9 Months Ended
	Jul. 31, 2012	Aug. 21, 2012 Common Stock [Member]	Aug. 21, 2012 Class A Common Stock [Member]
Entity Registrant Name	HEICO CORP
Entity Central Index Key	0000046619
Current Fiscal Year End Date	--10-31
Entity Filer Category	Large Accelerated Filer
Trading Symbol	hei
Entity Common Stock, Shares Outstanding		21,331,762	31,379,204
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jul. 31, 2012
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2012