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Property, Net (Details) (USD $)
 12 Months Ended
Dec. 26, 2012
Dec. 28, 2011
Dec. 29, 2010
Property Owned [Abstract]      
Total property owned $ 328,605,000 $ 322,457,000  
Less accumulated depreciation 234,046,000 223,010,000  
Property owned, net 94,559,000 99,447,000  
Property Held Under Capital Leases [Abstract]      
Buildings, vehicles, and other equipment held under capital leases 28,572,000 31,417,000  
Less accumulated amortization 16,127,000 18,092,000  
Property held under capital leases, net 12,445,000 13,325,000  
Total property, net 107,004,000 112,772,000  
Depreciation expense, including amortization of property under capital leases 19,100,000 23,700,000 24,500,000
Franchised Units [Member]
      
Property Owned [Abstract]      
Total property owned 80,584,000 48,458,000  
Less accumulated depreciation 55,647,000 33,064,000  
Property owned, net 24,937,000 15,394,000  
Property Held Under Capital Leases [Abstract]      
Buildings, vehicles, and other equipment held under capital leases 13,834,000 16,224,000  
Less accumulated amortization 9,627,000 11,204,000  
Property held under capital leases, net 4,207,000 5,020,000  
Total property, net 29,144,000 20,414,000  
Land [Member]
      
Property Owned [Abstract]      
Total property owned 26,622,000 27,144,000  
Land [Member] | Franchised Units [Member]
      
Property Owned [Abstract]      
Total property owned 14,377,000 12,219,000  
Building and leasehold improvements [Member]
      
Property Owned [Abstract]      
Total property owned 228,132,000 214,283,000  
Building and leasehold improvements [Member] | Franchised Units [Member]
      
Property Owned [Abstract]      
Total property owned 66,207,000 36,239,000  
Other property and equipment [Member]
      
Property Owned [Abstract]      
Total property owned $ 73,851,000 $ 81,030,000