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Fair Value Measurement, Financial Instruments And Risk Management (Summary Of Activity Associated With Cash Flow Hedges Reflected In AOCI) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 25, 2011
Dec. 26, 2010
Fair Value Measurement, Financial Instruments And Risk Management [Abstract]    
Beginning balance, net of tax $ 377 $ (302)
Changes in fair value gain, net of tax (643) 1,841
Reclass to earnings, net of tax 1,808 (1,162)
Ending balance, net of tax $ 1,542 $ 377