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Share-Based Compensation (Component of Net Income) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 25, 2019 | Dec. 26, 2018 | Dec. 27, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Total share-based compensation | $ 6,694 | $ 6,038 | $ 8,541
Performance share awards |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Total share-based compensation | 5,765 | 5,039 | 7,838
Restricted stock units for board members |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Total share-based compensation | $ 929 | $ 999 | $ 703

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