CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - UNAUDITED (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]
Balance at Oct. 31, 2012		$ 67,166	$ 213	$ 315	$ 244,632	$ 823	$ (823)	$ (3,572)	$ 375,085	$ 103,086	$ 719,759
Comprehensive income	54,274	4,109	0	0	0	0	0	244	43,658	6,263	50,165
Cash dividends		0	0	0	0	0	0	0	(116,645)	0	(116,645)
Issuance of common stock to HEICO Savings and Investment Plan		0	0	0	1,159	0	0	0	0	0	1,159
Share-based compensation expense		0	0	0	2,154	0	0	0	0	0	2,154
Proceeds from stock option exercises		0	1	1	284	0	0	0	0	0	286
Tax benefit from stock option exercises		0	0	0	5,177	0	0	0	0	0	5,177
Redemptions of common stock related to share-based compensation	2,364	0	0	0	(2,364)	0	0	0	0	0	(2,364)
Distributions to noncontrolling interests		(4,457)	0	0	0	0	0	0	0	0	0
Acquisitions of noncontrolling interests		(16,610)	0	0	0	0	0	0	0	0	0
Adjustments to redemption amount of redeemable noncontrolling interests		1,010	0	0	0	0	0	0	(1,010)	0	(1,010)
Deferred compensation obligation		0	0	0	0	105	(105)	0	0	0	0
Other		0	0	0	1	0	0	1	0	(1)	1
Balance at Apr. 30, 2013		51,218	214	316	251,043	928	(928)	(3,327)	301,088	109,348	658,682
Balance 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	64,691	3,583	0	0	0	0	0	(651)	55,822	5,937	61,108
Cash dividends	(27,200)	0	0	0	0	0	0	0	(27,225)	0	(27,225)
Issuance of common stock to HEICO Savings and Investment Plan		0	0	0	3,071	0	0	0	0	0	3,071
Share-based compensation expense		0	0	0	4,189	0	0	0	0	0	4,189
Proceeds from stock option exercises		0	0	0	400	0	0	0	0	0	400
Tax benefit from stock option exercises		0	0	0	93	0	0	0	0	0	93
Redemptions of common stock related to share-based compensation	273	0	0	0	(273)	0	0	0	0	0	(273)
Distributions to noncontrolling interests		(3,712)	0	0	0	0	0	0	0	(67,400)	(67,400)
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		(630)	0	0	0	0	0	0	630	0	630
Other		0	0	1	5	0	0	0	(1)	1	6
Balance at Apr. 30, 2014	$ 717,217	$ 37,833	$ 268	$ 397	$ 263,374	$ 1,138	$ (1,138)	$ (507)	$ 378,875	$ 74,810	$ 717,217