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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Fair value of derivative instruments (Details) - USD ($)
$ in Thousands
Jul. 31, 2019
Oct. 31, 2018
Derivatives, Fair Value [Line Items]    
Derivative assets $ 1,956 $ 3,085
Derivative liabilities 663 2,020
Foreign Exchange Forward [Member] | Designated as Hedging Instrument [Member]    
Derivatives, Fair Value [Line Items]    
Derivative assets 1,263 2,654
Derivative liabilities 488 1,616
Foreign Exchange Forward [Member] | Not Designated as Hedging Instrument [Member]    
Derivatives, Fair Value [Line Items]    
Derivative assets 693 431
Derivative liabilities $ 175 $ 404