ACQUISITIONS (Details Textuals) (USD $)	3 Months Ended		6 Months Ended		1 Months Ended
	Apr. 30, 2012	Apr. 30, 2011	Apr. 30, 2012	Oct. 31, 2011	Nov. 30, 2011 Switchcraft Inc [Member]	Mar. 31, 2012 Ramona Research Inc [Member]	Apr. 30, 2012 Moritz Aerospace Inc [Member]
Restructuring Cost and Reserve [Line Items]
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 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 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		$ 143,200,000
Business Acquisition, Contingent Consideration, at Fair Value	10,825,000		10,825,000	0
Business Acquisition Contingent Consideration Potential Cash Payment	14,600,000		14,600,000
Sales Revenues, Net	14,800,000		25,500,000
Net Income Attributable to HEICO	600,000		1,500,000
Accrued Additional Purchase Consideration From Prior Acquisition	10,145,000	1,300,000	10,145,000
Payments for Previous Acquisition		$ 4,100,000