Gain or (Loss) Recognized in Income on Derivatives (Detail) (Foreign Currency Contracts, Other Income/(Expense), USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Aug. 31, 2012	Aug. 31, 2011	Aug. 31, 2012	Aug. 31, 2011
Foreign Currency Contracts | Other Income/(Expense)
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in Income on Derivative	$ 628	$ (109)	$ (1,167)	$ (7,678)