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Financial Instruments - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Jul. 31, 2014
Jul. 31, 2013
Jul. 31, 2014
Jul. 31, 2013
Offsetting [Abstract]        
Maturity of foreign currency forward contracts     90 days  
Gains (loss) on foreign currency forward contracts $ (285) $ (1,313) $ (2,614) $ (1,887)
Gains (losses) in fair value of balance sheet positions denominated in foreign currencies $ 267 $ 1,402 $ 2,448 $ (571)