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Income Taxes (Cash Payments For Income Taxes, Net) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 25, 2010
Dec. 26, 2009
Income Taxes [Abstract]      
Cash tax payments (refunds), net $ 13,524 $ (5,026) $ (71,026)