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Other Income (Details)
$ in Thousands
12 Months Ended
Dec. 29, 2019
USD ($)
restaurant
Dec. 30, 2018
USD ($)
restaurant
Dec. 31, 2017
USD ($)
Sep. 29, 2019
Jun. 30, 2019
Mar. 31, 2019
Sep. 30, 2018
Jul. 01, 2018
Apr. 01, 2018
Other Income and Expenses [Abstract]                  
Other Operating Income (Expense), Net $ 1,911 $ 424 $ 333            
Proceeds from Legal Settlements 1,900                
Sale and Leaseback Transaction, Gain (Loss), Net $ 636                
Properties damaged in fire | restaurant 2 2              
Property, Plant and Equipment, Disposals $ 800                
Number of Restaurants 1,101 849   1,088 1,081 845 838 807 807
Gain on insurance recoveries $ 200 $ 424 $ 333