FAIR VALUE MEASUREMENTS, Assets and Liabilities, Measured at Fair Value Using Unobservable Inputs (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2019
Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Payment of contingent consideration	$ 1,246	$ 515	$ 2,630
Liabilities, Ending Balance	62,286
Fair Value, Inputs, Level 3 [Member]
Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Liabilities, Opening Balance	41,974	18,326
Contingent consideration related to acquisition	18,334	23,719
Increase in accrued contingent consideration, net	1,246	515
Payment of contingent consideration		(500)
Liabilities, Ending Balance		41,974	$ 18,326
Fair Value, Inputs, Level 3 [Member] | Foreign Currency Gain (Loss) [Member]
Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Change in Unrealized Gain (Loss)	$ 732	$ (86)