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Description of Business (Details)
12 Months Ended
Dec. 31, 2013
country
restaurant
state
Dec. 25, 2012
state
country
restaurant
Description of Business    
Threshold percentage of ownership for consolidated subsidiaries 50.00% 50.00%
Description of Business    
Number of restaurants 420 392
Number of states in which restaurants operate 48 47
Number of countries in which restaurants operate 3 2
Company-owned
   
Description of Business    
Number of restaurants 346 320
Company-owned | Wholly-owned
   
Description of Business    
Number of restaurants 331 305
Company-owned | Majority-owned
   
Description of Business    
Number of restaurants 15 15
Franchise
   
Description of Business    
Number of restaurants 74 71
License
   
Description of Business    
Number of restaurants   1
Franchised and/or licensed
   
Description of Business    
Number of restaurants   72