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]
Starting Balance at Oct. 31, 2012		$ 67,166	$ 213	$ 315	$ 244,632	$ 823	$ (823)	$ (3,572)	$ 375,085	$ 103,086	$ 719,759
Comprehensive income	89,640	6,127	0	0	0	0	0	842	72,605	10,066	83,513
Cash dividends		0	0	0	0	0	0	0	(120,361)	0	(120,361)
Issuance of common stock to HEICO Savings and Investment Plan		0	0	0	2,625	0	0	0	0	0	2,625
Share-based compensation expense		0	0	0	3,455	0	0	0	0	0	3,455
Proceeds from stock option exercises		0	1	1	344	0	0	0	0	0	346
Tax benefit from stock option exercises		0	0	0	5,180	0	0	0	0	0	5,180
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		(5,968)	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		1,327	0	0	0	0	0	0	(1,327)	0	(1,327)
Deferred compensation obligation		0	0	0	0	105	(105)	0	0	0	0
Other		402	0	1	0	0	0	3	(2)	24	26
Ending Balance at Jul. 31, 2013		52,444	214	317	253,872	928	(928)	(2,727)	326,000	113,176	690,852
Starting 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	99,979	4,180	0	0	0	0	0	(2,715)	89,188	9,326	95,799
Cash dividends	(27,200)	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	3,849	0	0	0	0	0	3,849
Share-based compensation expense		0	0	1	5,873	0	0	0	0	0	5,874
Proceeds from stock option exercises		0	0	0	594	0	0	0	0	0	594
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		(4,141)	0	0	0	0	0	0	0	(72,576)	(72,576)
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		(526)	0	0	0	0	0	0	526	0	526
Other		0	0	0	4	0	0	0	0	1	5
Ending Balance at Jul. 31, 2014	$ 745,294	$ 38,105	$ 268	$ 397	$ 266,029	$ 1,138	$ (1,138)	$ (2,571)	$ 408,148	$ 73,023	$ 745,294