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Fair Value Measurements (Details 2) (USD $)
 12 Months Ended
Dec. 28, 2013
Dec. 29, 2012
Dec. 31, 2011
Fair value hierarchy for assets and liabilities measured at fair value on a nonrecurring basis      
Impairment charges $ (5,750,000) $ (1,231,000) $ (957,000)
Property, plant and equipment-net 355,666,000 335,446,000  
Specific Company-owned stores
      
Fair value hierarchy for assets and liabilities measured at fair value on a nonrecurring basis      
Impairment charges (5,800,000) (1,200,000)  
Property, plant and equipment-net 6,400,000 1,200,000  
Property, plant and equipment - net, fair value 700,000 100,000  
Fair Value Measurement, Nonrecurring Basis | Level 3 | Specific Company-owned stores
      
Fair value hierarchy for assets and liabilities measured at fair value on a nonrecurring basis      
Specific Company-owned stores-net 668,000 67,000  
Fair Value Measurement, Nonrecurring Basis | Total | Specific Company-owned stores
      
Fair value hierarchy for assets and liabilities measured at fair value on a nonrecurring basis      
Specific Company-owned stores-net $ 668,000 $ 67,000