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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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Jan. 01, 2021 | Dec. 27, 2019 | Dec. 28, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Total share based compensation | $ 9,740 | $ 7,716 | $ 9,080
Restricted Stock Units (RSUs) [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Total share based compensation | 8,676 | 6,762 | 7,053
Common Stock Subject to Vesting Requirements [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Total share based compensation | $ 1,064 | $ 954 | $ 2,027

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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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=120381028&loc=d3e5070-113901 + Details
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