ACQUISITIONS (Details Textuals) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Oct. 31, 2015	Jul. 31, 2015	Apr. 30, 2015	Jan. 31, 2015	Oct. 31, 2014	Jul. 31, 2014	Apr. 30, 2014	Jan. 31, 2014	Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2013
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired									$ 166,784	$ 8,737	$ 222,638
Net sales	$ 328,672	$ 300,370	$ 291,421	$ 268,185	$ 292,223	$ 291,030	$ 282,232	$ 266,826	1,188,648	1,132,311	1,008,757
Net income attributable to HEICO	38,250	$ 34,369	$ 33,105	$ 27,640	32,105	$ 33,366	$ 28,367	$ 27,455	133,364	121,293	102,396
Contingent consideration, liability	$ 21,405				$ 1,184				21,405	1,184
Additional Purchase Consideration Paid										$ 2,000	1,200
FY 2015 Acquisition [Member]
Business Acquisition [Line Items]
Net sales									62,900
Net income attributable to HEICO									$ 7,900
Reinhold Industries [Member]
Business Acquisition [Line Items]
Name of the entity in which interest is owned									Reinhold Industries, Inc.
Date on which the acquirer obtains control of the acquiree									May 31, 2013
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.
HEICO Electronic [Member] | Midwest Microwave Solutions [Member]
Business Acquisition [Line Items]
Name of the entity in which interest is owned									Midwest Microwave Solutions, Inc.
Date on which the acquirer obtains control of the acquiree									Aug. 31, 2015
Description of the acquired entity									MMS designs, manufactures and sells unique Size, Weight, Power and Cost (SWAP-C) optimized Communications and Electronic Intercept Receivers and Tuners for military and intelligence applications.
Percentage of interest acquired in the subsidiary	80.10%								80.10%
Percentage of interest owned by noncontrolling shareholders	19.90%								19.90%
HEICO Electronic [Member] | 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.
Amount of contingent purchase consideration, the company could be required to pay											50,000
Heico Flight Support Corp [Member] | Reinhold Industries [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired									$ 132,973
Cash Acquired from Acquisition									$ 8,041
Net sales											30,800
Net income attributable to HEICO											2,800
Heico Flight Support Corp [Member] | Astroseal Products Manufacturing Corp [Member]
Business Acquisition [Line Items]
Name of the entity in which interest is owned									Astroseal Products Mfg. Corporation
Date on which the acquirer obtains control of the acquiree									Aug. 31, 2015
Description of the acquired entity									Astroseal manufactures expanded foil mesh, which is integrated into composite aerospace structures for lighting strike protection in fixed and rotary wing aircraft.
Heico Flight Support Corp [Member] | Aerospace & Commercial Technologies [Member]
Business Acquisition [Line Items]
Name of the entity in which interest is owned									Aerospace & Commercial Technologies, LLC
Date on which the acquirer obtains control of the acquiree									Aug. 31, 2015
Description of the acquired entity									ACT is a leading provider of products and services necessary to maintain up-to-date F-16 fighter aircraft operational capabilities.
Percentage of interest acquired in the subsidiary	80.10%								80.10%
Percentage of interest owned by noncontrolling shareholders	19.90%								19.90%
Heico Flight Support Corp [Member] | TEP [Member]
Business Acquisition [Line Items]
Name of the entity in which interest is owned									Thermal Energy Products, Inc.
Date on which the acquirer obtains control of the acquiree									May 31, 2015
Description of the acquired entity									TEP engineers, designs and manufactures removable/reusable insulation systems for industrial, commercial, aerospace and defense applications.
Heico Flight Support Corp [Member] | Harter [Member]
Business Acquisition [Line Items]
Name of the entity in which interest is owned									Harter Aerospace, LLC
Date on which the acquirer obtains control of the acquiree									Jan. 31, 2015
Description of the acquired entity									Harter is a globally recognized component and accessory maintenance, repair, and overhaul (MRO) station specializing in commercial aircraft accessories, including thrust reverse actuation systems and pneumatics, and electromechanical components.
Percentage of interest acquired in the subsidiary	80.10%								80.10%
Percentage of interest owned by noncontrolling shareholders	19.90%								19.90%
Heico Flight Support Corp [Member] | Aeroworks [Member]
Business Acquisition [Line Items]
Name of the entity in which interest is owned									Aeroworks International Holding B.V.
Date on which the acquirer obtains control of the acquiree									Jan. 31, 2015
Description of the acquired entity									Aeroworks, which is headquartered in the Netherlands and maintains a significant portion of its production facilities in Thailand and Laos, is a manufacturer of both composite and metal parts used primarily in aircraft interior applications, including seating, galleys, lavatories, doors, and overhead bins.
Percentage of interest acquired in the subsidiary	80.00%								80.00%
Percentage of interest owned by noncontrolling shareholders	20.00%								20.00%
Heico Flight Support Corp [Member] | 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.
Tranche One [Member] | HEICO Electronic [Member] | Lucix Corp [Member]
Business Acquisition [Line Items]
Contingent consideration, liability											7,000
Tranche Two [Member] | HEICO Electronic [Member] | Lucix Corp [Member]
Business Acquisition [Line Items]
Contingent consideration, liability											$ 13,700