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Income Taxes (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 23, 2012
Sep. 25, 2011
Unit
Sep. 23, 2012
Sep. 25, 2011
Aug. 15, 2011
Notes Due 2015 Called 2011 [Member]
Income Tax Disclosure [Abstract]          
Income tax (benefit)/expense $ (2,796) $ 12,440 $ 27,707 $ 3,509  
Effective tax rate, continuing operations 42.60% 66.10% 39.50%    
Units Sold In Fenway Sports Group   390      
Debt Instrument [Line Items]          
Interest rate on debt         14.053%
Unrecognized tax benefits that would impact effective tax rate $ 19,000   $ 19,000