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Impairment and Closure Costs (Details)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 29, 2015
USD ($)
restaurant
Dec. 30, 2014
USD ($)
Dec. 29, 2015
USD ($)
Dec. 30, 2014
USD ($)
restaurant
Dec. 31, 2013
USD ($)
restaurant
Impairment and Closure Costs          
Impairment and closure costs     $ 974 $ 636 $ 399
Closure costs $ 1,000        
Number of restaurants relocated | restaurant 2        
Impairment of goodwill   $ 600 0 $ 626 $ 0
Number of long-lived assets impaired | restaurant       1  
Impairment of restaurant     $ 0 $ 0  
Restaurant closed in 2009 | Closed          
Impairment and Closure Costs          
Number of long-lived assets impaired | restaurant         1
Impairment of restaurant         $ 200
Number of restaurants | restaurant         1
Restaurants closed in 2012 and 2009 | Closed          
Impairment and Closure Costs          
Closure costs         $ 200
Restaurant closed in 2012 | Closed          
Impairment and Closure Costs          
Number of restaurants | restaurant         1