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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
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