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Income Taxes (Reconciliation of The Federal Statutory Tax Rate With The Effective Tax Rate from Continuing Operations) (Details) | 12 Months Ended
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Dec. 27, 2019 | Dec. 28, 2018 | Dec. 29, 2017
Income Tax Disclosure [Abstract] |  |  |
U.S statutory income tax expense rate | 21.00% | 21.00% | 35.00%
State income taxes, net of federal income tax expense | 4.30% | 2.60% | 1.50%
Valuation reduction | 1.20% |  | 0.20%
Tax reform impact on deferred taxes |  |  | (14.40%)
Meals and entertainment | 0.50% | 1.00% | 1.00%
Foreign rate differential |  | 0.20% | (3.00%)
Share based compensation | (1.30%) | (3.60%) | (12.20%)
Purchase accounting | (0.80%) | (3.10%) | 1.20%
Foreign exchange loss | 0.20% | (0.30%) | 0.40%
Other, net | (0.10%) | (0.90%) | (0.60%)
Effective tax rate | 25.00% | 16.90% | 9.10%

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