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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

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