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Stock Based Compensation (Schedule of Share Based Compensation Included in Net Income) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 27, 2019 | Dec. 28, 2018 | Dec. 29, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Total share based compensation | $ 7,716 | $ 9,310 | $ 10,316
Restricted Stock Units (RSUs) [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Total share based compensation | 6,762 | 7,283 | 7,801
Common Stock Subject to Vesting Requirements [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Total share based compensation | $ 954 | $ 2,027 | $ 2,515

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- Definition Amount of cost expensed and capitalized for award under share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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