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Marketable Securities - Amortized Cost (Details) - USD ($) $ in Thousands | Dec. 27, 2025 | Dec. 28, 2024
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Debt Securities, Available-for-Sale, Fair Value to Amortized Cost, after Allowance for Credit Loss [Abstract] |  |
Amortized Cost | $ 99,473 | $ 189,930
Gross Unrealized Holding Gains | 2,137 | 2,695
Gross Unrealized Holding Losses | (4,519) | $ (6,583)
Fair Value | 97,091 |
Equity Securities, FV-NI, Fair Value by Fair Value Hierarchy Level |  | us-gaap:FairValueInputsLevel1Member
Corporate and municipal bonds |  |
Debt Securities, Available-for-Sale, Fair Value to Amortized Cost, after Allowance for Credit Loss [Abstract] |  |
Amortized Cost | 94,527 | $ 171,258
Gross Unrealized Holding Gains | 2,105 | 2,525
Gross Unrealized Holding Losses | (4,519) | (6,583)
Fair Value | $ 92,113 | $ 167,201
Debt Securities, Available-for-Sale, Fair Value by Fair Value Hierarchy Level | us-gaap:FairValueInputsLevel2Member | us-gaap:FairValueInputsLevel2Member
Commercial Paper |  |
Debt Securities, Available-for-Sale, Fair Value to Amortized Cost, after Allowance for Credit Loss [Abstract] |  |
Amortized Cost | $ 4,946 | $ 18,671
Gross Unrealized Holding Gains | 32 | 169
Fair Value | $ 4,978 | $ 18,840
Debt Securities, Available-for-Sale, Fair Value by Fair Value Hierarchy Level | us-gaap:FairValueInputsLevel2Member | us-gaap:FairValueInputsLevel2Member

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- Definition Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2 + Details
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