Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies (Narrative) (Details)

v3.19.1
Summary of Significant Accounting Policies (Narrative) (Details)
$ in Thousands
 3 Months Ended 12 Months Ended
Sep. 30, 2018
USD ($)
Dec. 30, 2018
USD ($)
Restaurant
segment
Dec. 31, 2017
USD ($)
Dec. 25, 2016
USD ($)
Restaurant
Summary of Significant Accounting Policies [Line Items]        
Gift Card Breakage   $ 200 $ 300  
Impairment and closure costs $ 12,336 $ 12,336 0 $ 1,517
Impairment charges, number of restaurants | Restaurant   6    
Marketing expense   $ 3,929 $ 2,756 $ 2,390
Number of Reportable Segments | segment   1    
Closure Costs, Number of Restaurants | Restaurant       1
Minimum [Member]        
Summary of Significant Accounting Policies [Line Items]        
Operating Lease, Liability   $ 215,000    
Operating Lease, Right-of-Use Asset   150,000    
Maximum [Member]        
Summary of Significant Accounting Policies [Line Items]        
Operating Lease, Liability   225,000    
Operating Lease, Right-of-Use Asset   $ 170,000    
Furniture and Fixtures [Member] | Minimum [Member]        
Summary of Significant Accounting Policies [Line Items]        
Estimated useful life   3 years    
Furniture and Fixtures [Member] | Maximum [Member]        
Summary of Significant Accounting Policies [Line Items]        
Estimated useful life   7 years    
Leasehold Improvements [Member] | Minimum [Member]        
Summary of Significant Accounting Policies [Line Items]        
Estimated useful life   5 years    
Leasehold Improvements [Member] | Maximum [Member]        
Summary of Significant Accounting Policies [Line Items]        
Estimated useful life   20 years