FAIR VALUE MEASUREMENTS (Contingent Consideration Liability) (Details) - USD ($) $ in Thousands	6 Months Ended
	Apr. 30, 2019	Oct. 31, 2018
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Change in value of contingent consideration	$ 3,104
Liabilities [Abstract]
Total liabilities	25,644	$ 20,875
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Opening balance, Liabilities	20,875
Change in accrued contingent consideration	3,104
Contingent consideration related to acquisition	2,107
Change in value of contingent consideration	(350)
Ending balance, Liabilities	25,644
Liabilities [Abstract]
Accrued Liabilities, Current	7,328
Other Liabilities, Noncurrent	18,316
Total liabilities	25,644	$ 20,875
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	$ (92)