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Financial Assets and Liabilities - Ineffective Portion and Portion Excluded from Effectiveness Testing of Derivative Hedge Gains (Losses) (Detail) (Foreign Exchange Contracts, USD $)
In Thousands, unless otherwise specified
 3 Months Ended 9 Months Ended
Jul. 31, 2014
Jul. 31, 2013
Jul. 31, 2014
Jul. 31, 2013
Foreign Exchange Contracts
        
Financial Assets and Liabilities [Line Items]        
Amount of gain (loss) recognized in income statement on derivatives (ineffective portion) $ 24 [1] $ 90 [1] $ 57 [1] $ 256 [1]
Amount of gain (loss) recognized in income statement on derivatives (excluded from effectiveness testing) $ 548 [2] $ 260 [2] $ 2,950 [2] $ 1,522 [2]
[1] The ineffective portion includes forecast inaccuracies.
[2] The portion excluded from effectiveness testing includes the discount earned or premium paid for the contracts.