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Introduction and Basis of Reporting (Details)
 12 Months Ended
Dec. 26, 2012
restaurant
Dec. 28, 2011
restaurant
Franchisor Disclosure [Line Items]    
Number of States in which entity operates 50  
Number of territories in which entity operates 2  
Number of countries in which entity operates 7  
Entity and franchisee unit activity [Abstract]    
Restaurant units, end of period 1,688 1,685
Company-owned restaurants [Member]
    
Entity and franchisee unit activity [Abstract]    
Restaurant units, beginning of period 206 232
Units opened 1 8
Units acquired 1 0
Units sold to franchisees (36) (30)
Units closed (including units relocated) (8) (4)
Restaurant units, end of period 164 206
Franchised and licensed restaurants [Member]
    
Entity and franchisee unit activity [Abstract]    
Restaurant units, beginning of period 1,479 1,426
Units opened 39 53
Units relocated 2 1
Units purchased from Company 36 30
Units acquired (1) 0
Units closed (including units relocated) (31) (31)
Restaurant units, end of period 1,524 1,479
California
    
Franchisor Disclosure [Line Items]    
Percentage of restaurants operated (percent) 24.00%  
Florida
    
Franchisor Disclosure [Line Items]    
Percentage of restaurants operated (percent) 9.00%  
Texas
    
Franchisor Disclosure [Line Items]    
Percentage of restaurants operated (percent) 11.00%