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Fair Value Measurements And Derivatives Instruments (Gain Or (Loss) Recognized In Income On Derivatives Not Designated As Hedging Instruments) (Details) (Foreign Currency Contracts [Member], Other Income/(Expense) [Member], USD $)
In Thousands, unless otherwise specified
3 Months Ended
Feb. 28, 2012
Feb. 28, 2011
Foreign Currency Contracts [Member] | Other Income/(Expense) [Member]
   
Fair Value Measurements and Derivative Instruments [Line Items]    
Amount of Gain or (Loss) Recognized in Income on Derivative $ (1,358) $ (4,434)