NET INCOME PER SHARE ATTRIBUTABLE TO HEICO SHAREHOLDERS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Oct. 31, 2016	Jul. 31, 2016	Apr. 30, 2016	Jan. 31, 2016	Oct. 31, 2015	Jul. 31, 2015	Apr. 30, 2015	Jan. 31, 2015	Oct. 31, 2016	Oct. 31, 2015	Oct. 31, 2014
Numerator:
Net income attributable to HEICO	$ 44,262	$ 42,002	$ 38,657	$ 31,271	$ 38,250	$ 34,369	$ 33,105	$ 27,640	$ 156,192	$ 133,364	$ 121,293
Denominator:
Weighted average common shares outstanding - basic									67,045	66,740	66,463
Effect of dilutive stock options									1,125	1,071	990
Weighted Average Number of Shares Outstanding, Diluted									68,170	67,811	67,453
Basic	$ 0.66	$ 0.63	$ 0.58	$ 0.47	$ 0.57	$ 0.51	$ 0.50	$ 0.42	$ 2.33	$ 2.00	$ 1.82
Diluted	$ 0.65	$ 0.62	$ 0.57	$ 0.46	$ 0.56	$ 0.51	$ 0.49	$ 0.41	$ 2.29	$ 1.97	$ 1.80
Anti-dilutive stock options excluded									580	412	430