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Marketable Securities - Schedule of Amortized Cost and Estimated Fair Value of Marketable Securities by Contractual Maturity (Details) - USD ($) $ in Thousands | Sep. 25, 2021 | Dec. 26, 2020
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Investments Debt And Equity Securities [Abstract] |  |
Amortized Cost, Due in one year or less | $ 342,809 |
Amortized Cost, Due after one year through five years | 1,174,790 |
Amortized Cost, Due after five years through ten years | 67,278 |
Amortized Cost, Due after ten years | 3,156 |
Amortized Cost | 1,588,033 | $ 1,492,770
Fair Value, Due in one year or less | 345,214 |
Fair Value, Due after one year through five years | 1,183,662 |
Fair Value, Due after five years through ten years | 67,038 |
Fair Value, Due after ten years | 2,889 |
Fair Value, Total | $ 1,598,803 | $ 1,518,817

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