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Impairment of Assets (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 26, 2011
Jun. 27, 2010
Dec. 27, 2009
Jun. 26, 2011
Jun. 27, 2010
Dec. 26, 2010
Impairment of assets            
Impairment of assets $ 161,318 $ 0   $ 161,318 $ 0  
Write-down of goodwill at the Regional Media Group 152,093     152,093    
Goodwill (less accumulated impairment losses) 496,105     496,105   644,464
Write-down of certain assets held for sale 9,225          
Impairment testing growth rate assumption     2.00%      
Impairment testing discount rate assumption     10.50% 10.70%    
Other intangible assets acquired 23,944     23,944   35,415
Regional Media Group
           
Impairment of assets            
Goodwill (less accumulated impairment losses) 0     0    
Assets Held-for-sale
           
Impairment of assets            
Other intangible assets acquired $ 0     $ 0