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Basis of Presentation and Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands | Dec. 30, 2018 | Jun. 27, 2020 | Dec. 28, 2019
--- | --- | --- | ---
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Operating lease assets |  | $ 50,802 | $ 54,408
Operating lease liability |  | $ 50,802 | $ 54,408
ASU 2016-02 |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Operating lease assets | $ 57,500 |  |
Operating lease liability | 57,500 |  |
Cumulative Effect, Period of Adoption, Adjustment | ASU 2016-02 |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Gain associated with sale-leaseback transactions | $ 1,700 |  |

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