Summary Of Significant Accounting Policies (Details) $ in Thousands	12 Months Ended
	Dec. 27, 2016 USD ($) customer store	Dec. 29, 2015 USD ($) customer store	Dec. 30, 2014 USD ($) customer store	Sep. 08, 2015 store
Organization And Basis Of Presentation [Line Items]
Number of beef suppliers | customer	1	1	1
Interest capitalized | $	$ 19	$ 115	$ 0
Non-cash impairment charges | $	600	3,200	3,500
Advertising costs | $	$ 8,300	$ 7,700	$ 6,200
Locations with impairment charges [Member]
Organization And Basis Of Presentation [Line Items]
Number of restaurants	2			1
Leasehold Improvements [Member]
Organization And Basis Of Presentation [Line Items]
Estimated useful life of assets	20 years
Minimum [Member]
Organization And Basis Of Presentation [Line Items]
Finite lived intangible assets useful life	7 years
Tax benefit cummulatively likely to be realized	50.00%
Minimum [Member] | Building [Member]
Organization And Basis Of Presentation [Line Items]
Estimated useful life of assets	20 years
Minimum [Member] | Furniture Fixtures And Equipment [Member]
Organization And Basis Of Presentation [Line Items]
Estimated useful life of assets	3 years
Maximum [Member]
Organization And Basis Of Presentation [Line Items]
Finite lived intangible assets useful life	17 years
Maximum [Member] | Building [Member]
Organization And Basis Of Presentation [Line Items]
Estimated useful life of assets	25 years
Maximum [Member] | Furniture Fixtures And Equipment [Member]
Organization And Basis Of Presentation [Line Items]
Estimated useful life of assets	7 years
Del Frisco's [Member]
Organization And Basis Of Presentation [Line Items]
Number of restaurants	12
Sullivan's [Member]
Organization And Basis Of Presentation [Line Items]
Number of restaurants	18
Sullivan's [Member] | Locations with impairment charges [Member]
Organization And Basis Of Presentation [Line Items]
Number of restaurants	2
Grille [Member]
Organization And Basis Of Presentation [Line Items]
Number of restaurants	23
Grille [Member] | Locations with impairment charges [Member]
Organization And Basis Of Presentation [Line Items]
Number of restaurants		1	1