Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies (Narrative)(Details)

v3.8.0.1
Summary of Significant Accounting Policies (Narrative)(Details)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 25, 2016
USD ($)
Sep. 25, 2016
USD ($)
Dec. 31, 2017
USD ($)
segment
Dec. 25, 2016
USD ($)
Dec. 27, 2015
USD ($)
Restaurant
Summary of Significant Accounting Policies [Line Items]          
Gift Card Breakage     $ 300    
Operating Leases, Future Minimum Payments Due     404,691    
Impairment and closure costs $ 1,100 $ 400 0 $ 1,517 $ 4,360
Impairment charges, number of restaurants | Restaurant         3
Marketing expense     $ 2,756 $ 2,390 $ 2,249
Number of Reportable Segments | segment     1    
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