ACQUISITIONS (Details Textuals) (USD $)	3 Months Ended								12 Months Ended			0 Months Ended		1 Months Ended						12 Months Ended
	Oct. 31, 2014	Jul. 31, 2014	Apr. 30, 2014	Jan. 31, 2014	Oct. 31, 2013	Jul. 31, 2013	Apr. 30, 2013	Jan. 31, 2013	Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2012	May 31, 2013	Nov. 22, 2011	Jun. 30, 2014	Oct. 31, 2013	Oct. 31, 2012	Aug. 31, 2012	Apr. 30, 2012	Mar. 31, 2012	Oct. 31, 2011	Oct. 31, 2005
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired									$ 8,737,000	$ 222,638,000	$ 197,285,000
Net sales	292,223,000	291,030,000	282,232,000	266,826,000	287,426,000	267,133,000	237,708,000	216,490,000	1,132,311,000	1,008,757,000	897,347,000
Net income attributable to HEICO	32,105,000	33,366,000	28,367,000	27,455,000	29,791,000	28,947,000	23,700,000	19,958,000	121,293,000	102,396,000	85,147,000
Additional Purchase Consideration Paid									2,000,000	1,200,000	5,500,000
Reinhold Industries [Member]
Business Acquisition [Line Items]
Name of the entity in which interest is owned									Reinhold Industries, Inc.
Payments to Acquire Businesses, Net of Cash Acquired												133,000,000
Cash Acquired from Acquisition												8,000,000
Date on which the acquirer obtains control of the acquiree												May 31, 2013
Net sales										30,800,000
Net income attributable to HEICO										2,800,000
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 Inc [Member]
Business Acquisition [Line Items]
Name of the entity in which interest is owned									Switchcraft, Inc.
Payments to Acquire Businesses, Net of Cash Acquired													142,700,000
Cash Acquired from Acquisition													3,700,000
Date on which the acquirer obtains control of the acquiree													Nov. 22, 2011
Net sales											54,600,000
Net income attributable to HEICO											3,600,000
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.
Quest Aviation [Member]
Business Acquisition [Line Items]
Name of the entity in which interest is owned									Quest Aviation Supply, Inc.
Date on which the acquirer obtains control of the acquiree														Jun. 30, 2014
Description of the acquired entity									Quest Aviation is a niche supplier of parts to repair thrust reversers on various aircraft engines.
Lucix Corp [Member]
Business Acquisition [Line Items]
Name of the entity in which interest is owned									Lucix Corporation
Date on which the acquirer obtains control of the acquiree															Oct. 31, 2013
Description of the acquired entity									Lucix is a leading designer and manufacturer of high performance, high reliability microwave modules, units, and integrated sub-systems for commercial and military satellites.
Business Combination, Contingent Consideration, Liability, Current					7,000,000					7,000,000					7,000,000
Contingent consideration, liability					13,700,000					13,700,000					13,700,000
Amount of contingent purchase consideration, the company could be required to pay					50,000,000					50,000,000					50,000,000
Action Research Corporation [Member]
Business Acquisition [Line Items]
Name of the entity in which interest is owned									Action Research Corporation
Date on which the acquirer obtains control of the acquiree																Oct. 31, 2012
Description of the acquired entity									Action Research is an FAA-Approved Repair Station that has developed unique proprietary repairs that extend the lives of certain engine and airframe components.
Percentage of interest acquired in the subsidiary											80.10%					80.10%
Percentage of interest owned by noncontrolling shareholders											19.90%					19.90%
CSI Aerospace [Member]
Business Acquisition [Line Items]
Name of the entity in which interest is owned									CSI Aerospace, Inc.
Date on which the acquirer obtains control of the acquiree																	Aug. 31, 2012
Description of the acquired entity									CSI Aerospace is a leading repair and overhaul provider of specialized components for airlines, military and other aerospace related organizations.
Percentage of interest acquired in the subsidiary																	84.00%
Percentage of interest owned by noncontrolling shareholders																	16.00%
Moritz Aerospace Inc [Member]
Business Acquisition [Line Items]
Name of the entity in which interest is owned									Moritz Aerospace, Inc.
Date on which the acquirer obtains control of the acquiree																		Apr. 30, 2012
Description of the acquired entity									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 Inc [Member]
Business Acquisition [Line Items]
Name of the entity in which interest is owned									Ramona Research, Inc.
Date on which the acquirer obtains control of the acquiree																			Mar. 31, 2012
Description of the acquired entity									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.
Contingent consideration, liability																			10,800,000
Amount of contingent purchase consideration, the company could be required to pay																			14,600,000
Electronic Technologies Group [Member]
Business Acquisition [Line Items]
Net sales									379,404,000	350,033,000	331,598,000
Additional Purchase Consideration Paid											$ 15,100,000									$ 4,800,000
Electronic Technologies Group [Member] | Subsidiary Three [Member]
Business Acquisition [Line Items]
Percentage of interest acquired in the subsidiary																					85.00%