ACQUISITIONS (Details Textuals) (USD $)	3 Months Ended								12 Months Ended				12 Months Ended				12 Months Ended			12 Months Ended			12 Months Ended		12 Months Ended			12 Months Ended			12 Months Ended
	Oct. 31, 2013	Jul. 31, 2013	Apr. 30, 2013	Jan. 31, 2013	Oct. 31, 2012	Jul. 31, 2012	Apr. 30, 2012	Jan. 31, 2012	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2011	Oct. 31, 2010	Oct. 31, 2013 Subsidiary Four [Member]	Oct. 31, 2012 Subsidiary Three [Member]	Oct. 31, 2013 Reinhold Industries [Member]	May 31, 2013 Reinhold Industries [Member]	Oct. 31, 2012 Switchcraft Inc [Member]	Oct. 31, 2013 Switchcraft Inc [Member]	Nov. 22, 2011 Switchcraft Inc [Member]	Oct. 31, 2013 Lucix Corp [Member]	Oct. 31, 2013 Action Research Corporation [Member]	Oct. 31, 2012 Action Research Corporation [Member]	Oct. 31, 2013 CSI Aerospace [Member]	Aug. 31, 2012 CSI Aerospace [Member]	Oct. 31, 2013 Moritz Aerospace Inc [Member]	Oct. 31, 2013 Ramona Research Inc [Member]	Mar. 31, 2012 Ramona Research Inc [Member]	Oct. 31, 2013 3 D Plus [Member]	Oct. 31, 2013 Blue Aerospace [Member]	Dec. 31, 2010 Blue Aerospace [Member]	Oct. 31, 2012 Electronic Technologies Group [Member]	Oct. 31, 2011 Electronic Technologies Group [Member]
Business Acquisition [Line Items]
Name of the entity in which interest is owned															Reinhold Industries, Inc.			Switchcraft, Inc.		Lucix Corporation	Action Research Corporation		CSI Aerospace, Inc.		Moritz Aerospace, Inc.	Ramona Research, Inc.		3D Plus SA	Blue Aerospace LLC
Date on which the acquirer obtains control of the acquiree															May 31, 2013			Nov. 22, 2011		Oct. 31, 2013	Oct. 31, 2012		Aug. 31, 2012		Apr. 30, 2012	Mar. 31, 2012		Sep. 30, 2011	Dec. 31, 2010
Net assets acquired, excluding cash																$ 132,973,000			$ 142,713,000
Cash and equivalents acquired																8,000,000			3,700,000
Net sales	287,426,000	267,133,000	237,708,000	216,490,000	242,409,000	225,969,000	216,314,000	212,655,000	1,008,757,000	897,347,000	764,891,000				30,800,000		54,600,000
Net income attributable to HEICO	29,791,000	28,947,000	23,700,000	19,958,000	23,791,000	23,128,000	19,043,000	19,185,000	102,396,000	85,147,000	72,820,000				2,800,000		3,600,000
Description of the acquired entity															Reinhold is a leading manufacturer of advanced niche components and complex composite assemblies for commercial aviation, defense and space applications.			Switchcraft is a leading designer and manufacturer of high performance, high reliability and harsh environment electronic connectors and other interconnect products.		Lucix is a leading designer and manufacturer of high performance, high reliability microwave modules, units, and integrated sub-systems for commercial and military satellites.	Action Research is an FAA-Approved Repair Station that has developed unique proprietary repairs that extend the lives of certain engine and airframe components.		CSI Aerospace is a leading repair and overhaul provider of specialized components for airlines, military and other aerospace related organizations.		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.	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.		3D Plus is a leading designer and manufacturer of three-dimensional microelectronic and stacked memory products used predominately in satellites and also utilized in medical equipment.	Blue Aerospace is a supplier, distributor, and integrator of military aircraft parts and support services primarily to foreign military organizations allied with the United States.
Contingent consideration, liability	29,310,000				10,897,000				29,310,000	10,897,000	4,800,000	4,100,000								20,700,000							10,800,000
Amount of contingent purchase consideration, the company could be required to pay																				50,000,000							14,600,000
Percentage of interest acquired in the subsidiary																						80.10%		84.00%						80.10%
Percentage of interest owned by noncontrolling shareholders																						19.90%		16.00%						19.90%
Additional Purchase Consideration Paid													$ 1,200,000	$ 5,500,000																	$ 15,100,000	$ 6,600,000