ACQUISITIONS ACQUISITIONS (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2013
Business Acquisition [Line Items]
Cash paid, net	$ 166,784	$ 8,737	$ 222,638
Additional purchase consideration	(204)	$ (56)	$ 2,068
Heico Flight Support Corp [Member] | Reinhold Industries [Member]
Business Acquisition [Line Items]
Cash paid	141,014
Less: cash acquired	(8,041)
Cash paid, net	132,973
Additional purchase consideration	1,499
Total purchase consideration	$ 134,472