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Goodwill and Other Intangible Assets (Details)
$ in Thousands
6 Months Ended
Jun. 28, 2017
USD ($)
restaurants
Dec. 28, 2016
USD ($)
Goodwill [Roll Forward]    
Balance, December 28, 2016 $ 35,233  
Additions related to acquisition 1,060  
Adjustments related to the sale of restaurants 15  
Balance, June 28, 2017 36,308  
Intangible Assets [Line Items]    
Gross carrying amount - Trade names 44,077 $ 44,076
Gross carrying amount - Liquor licenses 166 166
Accumulated amortization - Intangible assets with definite lives 2,027 1,437
Intangible assets $ 58,418 55,930
Restaurants reacquired from franchisees | restaurants 6  
Purchase price to reacquire franchised restaurants $ 4,500  
Purchase price allocation of property 800  
Purchase price allocation of goodwill 1,060  
Capital leases recorded related to acquired franchise restaurants 1,200  
Other Intangible Assets [Member]    
Intangible Assets [Line Items]    
Gross carrying amount - Intangible assets with definite lives 0 190
Accumulated amortization - Intangible assets with definite lives 0 186
Franchise Rights [Member]    
Intangible Assets [Line Items]    
Gross carrying amount - Intangible assets with definite lives 14,175 11,498
Accumulated amortization - Intangible assets with definite lives 2,027 $ 1,251
Purchase price allocation of reacquired franchise rights $ 2,700