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Marketable Securities - Maturities (Details) - USD ($)
$ in Thousands
Dec. 25, 2021
Dec. 26, 2020
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Amortized Cost, Rolling Maturity [Abstract]    
Amortized Cost, Due within one year $ 48,596  
Amortized Cost, Due after one year through five years 97,438  
Amortized Cost, Due after five years through ten years 50,844  
Amortized Cost 196,878 $ 99,861
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling Maturity, Fair Value [Abstract]    
Fair Value, Due within one year 48,610  
Fair Value, Due after one year through five years 98,897  
Fair Value, Due after five years through ten years 51,728  
Fair Value $ 199,235 $ 104,445