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, 2012	Nov. 30, 2011
Other Current Assets
Fair Value Measurements and Derivative Instruments [Line Items]
Foreign currency forward contracts, Assets	$ 101	$ 142
Accrued Liabilities
Fair Value Measurements and Derivative Instruments [Line Items]
Foreign currency forward contracts, Liabilities	$ 130	$ 142