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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Fair value of derivative instruments (Details) - USD ($)
$ in Thousands
Jul. 31, 2020
Oct. 31, 2019
Derivatives, Fair Value [Line Items]    
Derivative assets $ 367 $ 1,391
Derivative liabilities 1,825 388
Foreign Exchange Forward | Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Derivative assets 187 751
Derivative liabilities 496 99
Foreign Exchange Forward | Not Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Derivative assets 180 640
Derivative liabilities $ 1,329 $ 289