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Commitments and Contingencies (Details) (USD $)
3 Months Ended
Mar. 26, 2013
item
Dec. 25, 2012
Commitments and Contingencies    
Estimated cost to complete capital project commitments (in dollars) $ 79,200,000 $ 73,200,000
Amount of liability recorded for guarantees 0  
Ownership percentage 5.00%  
Number of suppliers providing most of the company's beef 4  
Material minimum purchase commitments $ 0  
Minimum age specified in age discrimination allegation against entity 40 years