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		6 Months Ended
		Apr. 30, 2016	Apr. 30, 2015	Apr. 30, 2016	Apr. 30, 2015
Financial Assets and Liabilities [Line Items]
Amount of gain (loss) recognized in statement of operations on derivatives (ineffective portion)(1)	[1]	$ 201	$ (40)	$ 455	$ 700
Amount of gain (loss) recognized in statement of operations on derivatives (excluded from effectiveness testing)(2)	[2]	$ 2,140	$ 1,234	$ 3,541	$ 2,306

[1] The ineffective portion includes forecast inaccuracies.

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