CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Redeemable Noncontrolling Interests [Member]	Common Stock [Member]	Common Stock [Member] Common Class A [Member]	Capital in Excess of Par Value [Member]	Deferred Compensation Obligation [Member]	HEICO Stock Held By Irrevocable Trust [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]	Noncontrolling Interest [Member]	Total Shareholders Equity [Member]
Balances at Oct. 31, 2012			$ 213	$ 315	$ 244,632	$ 823	$ (823)	$ (3,572)	$ 375,085	$ 103,086	$ 719,759
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest	$ 22,165	$ 8,386								13,779
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	106,114							3,718	102,396
Comprehensive Income (Loss)	128,279										119,893
Cash dividends	(116,600)								(120,361)		(120,361)
Five-for-four common stock split			54	79
Five-for-four common stock split					(133)				17		17
Issuance of common stock to HEICO Savings and Investment Plan					2,985						2,985
Share-based compensation expense					5,117						5,117
Proceeds from stock option exercises			1	2	460						463
Tax benefit from stock option exercises					5,191						5,191
Redemptions of common stock related to stock option exercises	(2,364)				(2,364)						(2,364)
Distributions to noncontrolling interests		(7,579)
Adjustments to redemption amount of redeemable noncontrolling interests		7,454							(7,454)		(7,454)
Deferred Compensation Obligation						315
Stock Held During Period Value Deferred Compensation Obligation							(315)
Other					1			(2)		24	23
Balances at Oct. 31, 2013			268	396	255,889	1,138	(1,138)	144	349,649	116,889	723,235
Redeemable noncontrolling interests at Oct. 31, 2012		67,166
Increase (Decrease) in Temporary Equity [Roll Forward]
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest	22,165	8,386								13,779
Distributions to noncontrolling interests		(7,579)
Acquisitions of noncontrolling interests		(16,610)
Adjustments to redemption amount of redeemable noncontrolling interests		7,454							(7,454)		(7,454)
Temporary Equity, Other Changes		401
Redeemable noncontrolling interests at Oct. 31, 2013		59,218
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest	17,479	5,313								12,166
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	112,860							(8,433)	121,293
Comprehensive Income (Loss)	130,339										125,026
Cash dividends	(27,200)								(31,215)		(31,215)
Issuance of common stock to HEICO Savings and Investment Plan					5,504						5,504
Stock Granted, Value, Share-based Compensation, Net of Forfeitures				1
Share-based compensation expense					7,425						7,426
Proceeds from stock option exercises					708						708
Tax benefit from stock option exercises					93						93
Redemptions of common stock related to stock option exercises	(273)				(273)						(273)
Distributions to noncontrolling interests		(5,908)								(73,304)	(73,304)
Reclassification of redeemable noncontrolling interests to noncontrolling interests		19,383								19,383	19,383
Adjustments to redemption amount of redeemable noncontrolling interests		1,969							(1,969)		(1,969)
Other					5				(1)	1	5
Balances at Oct. 31, 2014	774,619		268	397	269,351	1,138	(1,138)	(8,289)	437,757	75,135	774,619
Increase (Decrease) in Temporary Equity [Roll Forward]
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest	17,479	5,313								12,166
Distributions to noncontrolling interests		(5,908)								(73,304)	(73,304)
Acquisitions of noncontrolling interests		(1,243)
Reclassification of redeemable noncontrolling interests to noncontrolling interests		19,383								19,383	19,383
Adjustments to redemption amount of redeemable noncontrolling interests		1,969							(1,969)		(1,969)
Redeemable noncontrolling interests at Oct. 31, 2014	39,966	39,966
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest	19,340	6,534								12,806
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	116,573							(16,791)	133,364
Comprehensive Income (Loss)	135,913										129,379
Cash dividends									(9,343)		(9,343)
Issuance of common stock to HEICO Savings and Investment Plan			1	1	5,752						5,754
Share-based compensation expense					6,048						6,048
Proceeds from stock option exercises				2	3,671						3,673
Tax benefit from stock option exercises					1,402						1,402
Redemptions of common stock related to stock option exercises	(5)				(5)						(5)
Distributions to noncontrolling interests		(5,166)								(4,533)	(4,533)
Adjustments to redemption amount of redeemable noncontrolling interests		13,724							(13,724)		(13,724)
Deferred Compensation Obligation						645
Stock Held During Period Value Deferred Compensation Obligation							(645)
Other					1						1
Balances at Oct. 31, 2015	893,271		$ 269	$ 400	$ 286,220	$ 1,783	$ (1,783)	$ (25,080)	548,054	83,408	893,271
Increase (Decrease) in Temporary Equity [Roll Forward]
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest	19,340	6,534								12,806
Distributions to noncontrolling interests		(5,166)								$ (4,533)	(4,533)
Adjustments to redemption amount of redeemable noncontrolling interests		13,724							$ (13,724)		$ (13,724)
Noncontrolling interests assumed related to acquisition		36,224
Redeemable noncontrolling interests at Oct. 31, 2015	$ 91,282	$ 91,282