FAIR VALUE MEASUREMENTS, Assets and liabilities, measured at fair value using unobservable inputs (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2012
Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Payment of contingent consideration	$ 0	$ (601)	$ 0
Change in value of contingent consideration	28,126	1,640	(119)
Fair Value, Inputs, Level 3 [Member]
Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Assets, Opening Balance	0	538
Total realized gains (loss)		48
Sales		(586)
Assets, Ending Balance	0	0
Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Liabilities, Opening Balance	29,310	10,897
Contingent consideration related to acquisition		20,654
Payment of contingent consideration		601
Change in value of contingent consideration	(28,126)	(1,640)
Liabilities, Ending Balance	$ 1,184	$ 29,310