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Marketable Securities - Amortized Cost (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 25, 2021
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Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract] |  |
Amortized Cost | $ 190,025 | $ 196,878
Gross Unrealized Holding Gains | 2,110 | 4,755
Gross Unrealized Holding Losses | (10,901) | (2,397)
Fair Value | 181,234 |
Bonds [Member] |  |
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract] |  |
Amortized Cost | 190,025 | 151,947
Gross Unrealized Holding Gains | 2,110 | 4,753
Gross Unrealized Holding Losses | (10,901) | (2,384)
Fair Value | $ 181,234 | 154,315
Commercial Paper [Member] |  |
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract] |  |
Amortized Cost |  | 44,931
Gross Unrealized Holding Gains |  | 2
Gross Unrealized Holding Losses |  | (13)
Fair Value |  | $ 44,920

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563 + Details
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