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Financial Instruments - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended
Jan. 31, 2018
Jan. 31, 2017
Derivative Instruments And Hedging Activities Disclosure [Abstract]    
Maturity of foreign currency forward contracts 90 days  
Gains (losses) on foreign currency forward contracts $ (964) $ (213)
Gains (losses) in fair value of balance sheet positions denominated in foreign currencies $ (982) $ 203