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Derivative Financial Instruments - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Jul. 31, 2019
Jul. 31, 2018
Jul. 31, 2019
Jul. 31, 2018
Derivative Instruments And Hedging Activities Disclosure [Abstract]        
Maturity of foreign currency forward contracts     90 days  
Gains (losses) on foreign currency forward contracts $ 975 $ 2,042 $ 769 $ (529)
Gains (losses) in fair value of balance sheet positions denominated in foreign currencies $ 407 $ (1,152) $ 267 $ 451