CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (USD $) In Thousands	Total	Redeemable Noncontrolling Interests [Member]	Common Stock [Member]	Class A Common Stock [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, 2011		$ 65,430	$ 171	$ 250	$ 226,120	$ 522	$ (522)	$ 3,033	$ 299,497	$ 91,083	$ 620,154
Comprehensive income	100,218	9,526	0	0	0	0	0	(6,457)	85,147	12,002	90,692
Cash dividends		0	0	0	0	0	0	0	(5,689)	0	(5,689)
Stock Issued During Period, Value, Stock Dividend			42	63
Five-for-four common stock split					(105)				(16)		(16)
Issuance of common stock to HEICO Savings and Investment Plan		0	0	0	982	0	0	0	0	0	982
Share-based compensation expense		0	0	0	3,948	0	0	0	0	0	3,948
Proceeds from stock option exercises	833	0	0	2	831	0	0	0	0	0	833
Tax benefit from stock option exercises		0	0	0	13,164	0	0	0	0	0	13,164
Redemptions of common stock related to stock option exercises		0	0	0	(307)	0	0	0	0	0	(307)
Distributions to noncontrolling interests		(9,090)	0	0	0	0	0	0	0	0	0
Acquisitions of noncontrolling interests		(7,616)	0	0	0	0	0	0	0	0	0
Adjustments to redemption amount of redeemable noncontrolling interests		3,775	0	0	0	0	0	0	(3,775)	0	(3,775)
Noncontrolling interests assumed related to acquisition		3,918	0	0	0	0	0	0	0	0	0
Deferred Compensation Obligation		0	0	0	0	301	(301)	0	0	0	0
Other		1,223	0	0	(1)	0	0	(148)	(79)	1	(227)
Balances at Oct. 31, 2012		67,166	213	315	244,632	823	(823)	(3,572)	375,085	103,086	719,759
Comprehensive income	128,279	8,386	0	0	0	0	0	3,718	102,396	13,779	119,893
Cash dividends		0	0	0	0	0	0	0	(120,361)	0	(120,361)
Stock Issued During Period, Value, Stock Dividend			54	79
Five-for-four common stock split					(133)				(17)		(17)
Issuance of common stock to HEICO Savings and Investment Plan		0	0	0	2,985	0	0	0	0	0	2,985
Share-based compensation expense		0	0	0	5,117	0	0	0	0	0	5,117
Proceeds from stock option exercises	463	0	1	2	460	0	0	0	0	0	463
Tax benefit from stock option exercises	5,191				5,191
Redemptions of common stock related to stock option exercises		0	0	0	(2,364)	0	0	0	0	0	(2,364)
Distributions to noncontrolling interests		(7,579)
Acquisitions of noncontrolling interests		(16,610)	0	0	0	0	0	0	0	0	0
Adjustments to redemption amount of redeemable noncontrolling interests		7,454	0	0	0	0	0	0	(7,454)	0	(7,454)
Deferred Compensation Obligation		0	0	0	0	315	(315)	0	0	0	0
Other		401	0	0	1	0	0	(2)	0	24	23
Balances at Oct. 31, 2013	723,235	59,218	268	396	255,889	1,138	(1,138)	144	349,649	116,889	723,235
Comprehensive income	130,339	5,313	0	0	0	0	0	(8,433)	121,293	12,166	125,026
Cash dividends		0	0	0	0	0	0	0	(31,215)	0	(31,215)
Issuance of common stock to HEICO Savings and Investment Plan		0	0	0	5,504	0	0	0	0	0	5,504
Share-based compensation expense		0	0	1	7,425	0	0	0	0	0	7,426
Proceeds from stock option exercises	708	0	0	0	708	0	0	0	0	0	708
Tax benefit from stock option exercises		0	0	0	93	0	0	0	0	0	93
Redemptions of common stock related to stock option exercises		0	0	0	(273)	0	0	0	0	0	(273)
Distributions to noncontrolling interests		(5,908)	0	0	0	0	0	0	0	(73,304)	(73,304)
Acquisitions of noncontrolling interests		(1,243)	0	0	0	0	0	0	0	0	0
Reclassification of redeemable noncontrolling interests to noncontrolling interests		(19,383)	0	0	0	0	0	0	0	19,383	19,383
Adjustments to redemption amount of redeemable noncontrolling interests		1,969	0	0	0	0	0	0	(1,969)	0	(1,969)
Other		0	0	0	5	0	0	0	(1)	1	5
Balances at Oct. 31, 2014	$ 774,619	$ 39,966	$ 268	$ 397	$ 269,351	$ 1,138	$ (1,138)	$ (8,289)	$ 437,757	$ 75,135	$ 774,619