SHARE-BASED COMPENSATION (Details 1) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2011
Number Outstanding (in shares)	3,264	3,142	2,899	2,893
Outstanding Weighted Average Exercise Price (in dollars per share)	$ 22.59	$ 21.48	$ 16.90	$ 14.50
Outstanding Weighted Average Contractual Life (in years)	6 years 1 month 8 days
Outstanding Aggregated Intrinsic Value (in dollars)	$ 88,232
Number Exercisable (in shares)	2,035
Exercisable Weighted Average Exercise Price (in dollars per share)	$ 17.55
Exercisable Weighted Average Contractual Life (in years)	5 years 1 month 6 days
Exercisable Aggregate Intrinsic Value (in dollars)	67,422
Heico Common Stock [Member]
Number Outstanding (in shares)	1,484
Outstanding Weighted Average Exercise Price (in dollars per share)	$ 21.14
Outstanding Weighted Average Contractual Life (in years)	5 years 4 months 24 days
Outstanding Aggregated Intrinsic Value (in dollars)	49,119
Number Exercisable (in shares)	1,181
Exercisable Weighted Average Exercise Price (in dollars per share)	$ 18.32
Exercisable Weighted Average Contractual Life (in years)	5 years
Exercisable Aggregate Intrinsic Value (in dollars)	42,425
Common Class A [Member]
Number Outstanding (in shares)	1,780
Outstanding Weighted Average Exercise Price (in dollars per share)	$ 23.80
Outstanding Weighted Average Contractual Life (in years)	6 years 7 months 6 days
Outstanding Aggregated Intrinsic Value (in dollars)	39,113
Number Exercisable (in shares)	854
Exercisable Weighted Average Exercise Price (in dollars per share)	$ 16.48
Exercisable Weighted Average Contractual Life (in years)	5 years 2 months 12 days
Exercisable Aggregate Intrinsic Value (in dollars)	$ 24,997