FAIR VALUE MEASUREMENTS (Contingent Consideration Liability) (Details) - USD ($) $ in Thousands	9 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Oct. 31, 2017
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Change in value of contingent consideration	$ (5,425)	$ 1,227
Liabilities [Abstract]
Total liabilities	18,565		$ 27,573
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Opening balance, Liabilities	27,573
Change in accrued contingent consideration	(3,789)
Ending balance, Liabilities	18,565
Liabilities [Abstract]
Accrued Liabilities, Current	3,886
Other Liabilities, Noncurrent	14,679
Total liabilities	18,565		$ 27,573
Foreign Currency Gain (Loss) [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Foreign currency transaction adjustments	$ 206