Fair Value Measurements and Derivative Instruments (Foreign Currency Forward Contracts Not Designated As Hedging Instruments) (Details) (Not Designated as Hedging Instrument, USD $) In Thousands, unless otherwise specified	Nov. 30, 2013	Nov. 30, 2012
Other Current Assets
Fair Value Measurements and Derivative Instruments [Line Items]
Foreign currency forward contracts, Assets	$ 625	$ 101
Accrued Liabilities
Fair Value Measurements and Derivative Instruments [Line Items]
Foreign currency forward contracts, Liabilities	$ 547	$ 130