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Impairment and Closure Costs (Details) (USD $)
3 Months Ended 12 Months Ended
Dec. 25, 2012
restaurant
Dec. 27, 2011
restaurant
Dec. 25, 2012
restaurant
Dec. 27, 2011
restaurant
Dec. 28, 2010
Impairment and Closure Costs          
Impairment charges related to goodwill and long-lived assets     $ 1,624,000 $ 1,201,000 $ 2,005,000
Impairment of goodwill and intangible assets     500,000    
Impairment charges write-down of building, equipment and furniture and fixtures 900,000   900,000    
Impairment of goodwill 500,000 800,000 252,000 839,000 1,700,000
Number of restaurants 392 366 392 366  
Ongoing closure costs 1,100,000 400,000      
Goodwill impairment
         
Impairment and Closure Costs          
Number of restaurants   1   1 4
Impairment of goodwill and intangible assets
         
Impairment and Closure Costs          
Number of restaurants 1   1    
Restaurant closed in 2012
         
Impairment and Closure Costs          
Number of restaurants 1   1    
Ongoing closure costs     200,000    
Restaurant closed in 2009
         
Impairment and Closure Costs          
Number of restaurants 1   1    
Restaurant closed in 2010
         
Impairment and Closure Costs          
Number of restaurants         1
Ongoing closure costs         200,000
Restaurant closed in 2008
         
Impairment and Closure Costs          
Number of restaurants   1   1  
Ongoing closure costs         $ 100,000