Fair Value Measurements and Derivative Instruments (Gain Or (Loss) Recognized In Income On Derivatives Not Designated As Hedging Instruments) (Details) (Not Designated as Hedging Instrument, Foreign Currency Contracts, Other Income/(Expense), USD $) In Thousands, unless otherwise specified	12 Months Ended
	Nov. 30, 2012	Nov. 30, 2011
Not Designated as Hedging Instrument | Foreign Currency Contracts | Other Income/(Expense)
Fair Value Measurements and Derivative Instruments [Line Items]
Amount of Gain or (Loss) Recognized In Income on Derivative	$ 2,961	$ 8,426