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Accrued Restructuring And Excess Facilities Costs (Narrative) (Details) (USD $)
In Thousands, unless otherwise specified
Feb. 28, 2012
Nov. 30, 2011
Accrued Restructuring And Excess Facilities Costs [Abstract]    
Accrued restructuring and excess facilities costs classified as long-term liabilities $ 866 $ 1,050
Accrued restructuring and excess facilities costs $ 3,288 $ 7,842