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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
3 Months Ended
Mar. 25, 2012
Fair Value Measurement, Financial Instruments And Risk Management [Abstract]  
Beginning balance, net of tax $ 1,542
Changes in fair value gain, net of tax (170)
Reclassification to earnings, net of tax (422)
Ending balance, net of tax $ 950