SHARE-BASED COMPENSATION (Details 1) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2012
Number Outstanding (in shares)	3,335	3,264	3,142	2,899
Outstanding Weighted Average Exercise Price (in dollars per share)	$ 25.52	$ 22.59	$ 21.48	$ 16.90
Outstanding Weighted Average Contractual Life (in years)	5 years 7 months 6 days
Outstanding Aggregated Intrinsic Value (in dollars)	$ 73,197
Number Exercisable (in shares)	2,250
Exercisable Weighted Average Exercise Price (in dollars per share)	$ 19.73
Exercisable Weighted Average Contractual Life (in years)	4 years 7 months 6 days
Exercisable Aggregate Intrinsic Value (in dollars)	$ 63,020
Heico Common Stock [Member]
Number Outstanding (in shares)	1,579
Outstanding Weighted Average Exercise Price (in dollars per share)	$ 23.54
Outstanding Weighted Average Contractual Life (in years)	4 years 10 months 24 days
Outstanding Aggregated Intrinsic Value (in dollars)	$ 43,230
Number Exercisable (in shares)	1,342
Exercisable Weighted Average Exercise Price (in dollars per share)	$ 19.60
Exercisable Weighted Average Contractual Life (in years)	4 years 3 months 18 days
Exercisable Aggregate Intrinsic Value (in dollars)	$ 41,376
Common Class A [Member]
Number Outstanding (in shares)	1,756
Outstanding Weighted Average Exercise Price (in dollars per share)	$ 27.30
Outstanding Weighted Average Contractual Life (in years)	6 years 3 months 18 days
Outstanding Aggregated Intrinsic Value (in dollars)	$ 29,967
Number Exercisable (in shares)	908
Exercisable Weighted Average Exercise Price (in dollars per share)	$ 19.91
Exercisable Weighted Average Contractual Life (in years)	5 years
Exercisable Aggregate Intrinsic Value (in dollars)	$ 21,644