Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies (Narrative) (Details)

v3.20.1
Summary of Significant Accounting Policies (Narrative) (Details)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 29, 2019
USD ($)
Restaurant
Sep. 29, 2019
USD ($)
Jun. 30, 2019
USD ($)
Mar. 31, 2019
USD ($)
Sep. 30, 2018
USD ($)
Dec. 29, 2019
USD ($)
Restaurant
segment
Dec. 30, 2018
USD ($)
Restaurant
Dec. 31, 2017
USD ($)
Accounting Policies [Abstract]                
Asset Impairment Charges           $ 12,693 $ 12,336 $ 0
Summary of Significant Accounting Policies                
Impairment and closed restaurant costs $ 6,300 $ 7,300 $ 200 $ 400 $ 12,300 $ 14,179 $ 12,336 0
Number of impaired restaurants | Restaurant 7         7 6  
Deferred Compensation Arrangement with Individual, Salary Deferral Allowed, Percent           80.00%    
Deferred Compensation Arrangement with Individual, Bonus Deferral Allowed, Percent           100.00%    
Deferred Compensation Plan Assets $ 400         $ 400 $ 100  
Deferred Compensation Plan Liability $ 400         400 100  
Gift Card Breakage           100 200 300
Marketing expense           $ 5,555 $ 3,929 $ 2,756
Number of Reportable Segments | segment           1    
Furniture and Fixtures | Minimum                
Summary of Significant Accounting Policies                
Estimated useful life           3 years    
Furniture and Fixtures | Maximum                
Summary of Significant Accounting Policies                
Estimated useful life           15 years    
Leasehold Improvements | Minimum                
Summary of Significant Accounting Policies                
Estimated useful life           5 years    
Leasehold Improvements | Maximum                
Summary of Significant Accounting Policies                
Estimated useful life           20 years