Ineffective Portions And Portions 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, 2012		Jul. 31, 2011		Jul. 31, 2012		Jul. 31, 2011
Foreign Exchange Contracts
Financial Assets and Liabilities [Line Items]
Amount of gain (loss) recognized in income statement on derivatives (ineffective portion)	$ 3	[1]	$ 121	[1]	$ 57	[1]	$ 75	[1]
Amount of gain (loss) recognized in income statement on derivatives (excluded from effectiveness testing)	$ 518	[2]	$ (247)	[2]	$ 1,385	[2]	$ (267)	[2]

[1] The ineffective portion includes forecast inaccuracies.

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