Financial Assets and Liabilities - Ineffective Portion and Portion Excluded from Effectiveness Testing of Derivative Hedge Gains (Losses) (Detail) - Foreign Exchange Contracts - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2016	Jul. 31, 2015
Financial Assets and Liabilities [Line Items]
Amount of gain (loss) recognized in statement of operations on derivatives (ineffective portion)(1)	[1]	$ 890	$ 122	$ 1,345	$ 822
Amount of gain (loss) recognized in statement of operations on derivatives (excluded from effectiveness testing)(2)	[2]	$ 1,827	$ 1,189	$ 5,368	$ 3,495

[1] The ineffective portion includes forecast inaccuracies.

[2] The portion excluded from effectiveness testing includes the discount earned or premium paid for the contracts.