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				6 Months Ended
	Apr. 30, 2015		Apr. 30, 2014		Apr. 30, 2015		Apr. 30, 2014
Foreign Exchange Contracts
Financial Assets and Liabilities [Line Items]
Amount of gain (loss) recognized in income statement on derivatives (ineffective portion)	$ (40)	[1]	$ (85)	[1]	$ 700	[1]	$ 34	[1]
Amount of gain (loss) recognized in income statement on derivatives (excluded from effectiveness testing)	$ 1,234	[2]	$ 808	[2]	$ 2,306	[2]	$ 2,402	[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.