ACQUISITIONS (Details Textuals) (USD $)	9 Months Ended		1 Months Ended	3 Months Ended	9 Months Ended	1 Months Ended	0 Months Ended	3 Months Ended			9 Months Ended
	Jul. 31, 2012	Jun. 30, 2012	Nov. 22, 2011 Switchcraft Inc [Member]	Jul. 31, 2012 Switchcraft Inc [Member]	Jul. 31, 2012 Switchcraft Inc [Member]	Mar. 19, 2012 Ramona Research Inc [Member]	Apr. 13, 2012 Moritz Aerospace Inc [Member]	Jul. 31, 2012 Electronic Technologies Group [Member]	Jul. 31, 2011 Electronic Technologies Group [Member]	Apr. 30, 2011 Electronic Technologies Group [Member]	Jul. 31, 2012 Electronic Technologies Group [Member]	Mar. 19, 2012 Fair Value, Inputs, Level 3 [Member] Ramona Research Inc [Member]
Business Acquisition [Line Items]
Sales Revenues, Net				$ 14,600,000	$ 40,100,000
Net Income Attributable to HEICO				1,000,000	2,500,000
Date on which the acquirer obtains control of the acquiree			Nov. 22, 2011			Mar. 31, 2012	Apr. 30, 2012
Name of the entity in which interest is owned			Switchcraft, Inc.			Ramona Research, Inc.	Moritz Aerospace, Inc.
Description of the acquired entity			Switchcraft is a leading designer and manufacturer of high performance, high reliability and harsh environment electronic connectors and other interconnect products.			Ramona Research designs and manufactures RF and microwave amplifiers, transmitters and receivers primarily used to support military communications on unmanned aerial systems, other aircraft, helicopters and ground-based data/communications systems.	The Moritz Aerospace product line designs and manufactures next generation wireless cabin control systems, solid state power distribution and management systems and fuel level sensing systems for business jets and for general aviation, as well as for the military/defense market segments.
Business Acquisition, Cost of Acquired Entity, Purchase Price			143,200,000
Business Acquisition, Contingent Consideration, at Fair Value												10,778,000
Business Acquisition Contingent Consideration Potential Cash Payment	14,600,000	71,000,000				14,600,000
Accrued Additional Purchase Consideration From Prior Acquisition									1,200,000
Payments for Previous Acquisition	$ 10,145,000							$ 10,100,000	$ 1,300,000	$ 4,100,000	$ 10,145,000