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Impairment of Assets Detail (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 25, 2011
Sep. 25, 2011
Jun. 26, 2011
Mar. 27, 2011
Dec. 26, 2010
Sep. 26, 2010
Jun. 27, 2010
Mar. 28, 2010
Dec. 25, 2011
Dec. 26, 2010
Dec. 27, 2009
Goodwill [Line Items]                      
Impairment of assets $ 3,116 $ 0 $ 161,318 $ 0 $ 0 $ 16,148 $ 0 $ 0 $ 164,434 $ 16,148 $ 4,179
Impairment of assets, goodwill     152,093           152,093    
Impairment of assets, property, plant and equipment                 1,767 16,148 4,179
Impairment testing discount rate assumption                 10.70% 10.50%  
Impairment testing annual growth rate assumption                   2.00%  
Goodwill 488,894       644,464       488,894 644,464 652,196
Carrying value of assets to be sold                   20,000  
Assets Held-for-sale [Member]
                     
Goodwill [Line Items]                      
Impairment of assets, property, plant and equipment     9,225                
About Group's Consumersearch Tradename [Member]
                     
Goodwill [Line Items]                      
Impairment of assets 3,116                    
About Group [Member]
                     
Goodwill [Line Items]                      
Impairment of assets, goodwill                 0    
Percentage of estimated fair value greater than carrying value                 18.00% 60.00%  
Goodwill 367,276       369,978       367,276 369,978 369,978
Carrying (Reported) Amount, Fair Value Disclosure [Member]
                     
Goodwill [Line Items]                      
Carrying value of goodwill after impairment charge 0               0    
Other intangible assets (excluding goodwill), fair value disclosure 2,864               2,864    
Carrying value of intangible asset after impairment charge 0               0    
Carrying value of property, plant, and equipment after impairment charge $ 0       $ 4,838       $ 0 $ 4,838 $ 0