Summary Of Significant Accounting Policies (Schedule of Finite-Lived and Indefinite-Lived Intangible Assets) (Details) - USD ($) $ in Thousands	Dec. 26, 2020	Dec. 28, 2019
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Accumulated Amortization	$ 3,345	$ 2,888
Intangible Assets, Gross (Excluding Goodwill)	20,115	19,988
Intangible Assets, Net (Excluding Goodwill)	16,770	17,100
Liquor Licenses [Member]
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Indefinite-lived Intangible Assets (Excluding Goodwill)	15,032	14,905
Asset Acquisitions And Other [Member]
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	5,083	5,083
Finite-Lived Intangible Assets, Accumulated Amortization	3,345	2,888
Finite-Lived Intangible Assets, Net	$ 1,738	$ 2,195