Marketable Securities - Fair Value (Details) - USD ($) $ in Thousands	Jun. 29, 2024	Dec. 30, 2023
Marketable Securities
Equity securities	$ 5,296	$ 4,910
Available-for-sale securities	229,853
Marketable securities	$ 235,149	$ 225,991
Equity Securities, FV-NI, Fair Value by Fair Value Hierarchy Level	us-gaap:FairValueInputsLevel1Member	us-gaap:FairValueInputsLevel1Member
Corporate and municipal bonds
Marketable Securities
Available-for-sale securities	$ 164,867	$ 175,272
Debt Securities, Available-for-Sale, Fair Value by Fair Value Hierarchy Level	us-gaap:FairValueInputsLevel2Member	us-gaap:FairValueInputsLevel2Member
Commercial Paper
Marketable Securities
Available-for-sale securities	$ 64,986	$ 45,808
Debt Securities, Available-for-Sale, Fair Value by Fair Value Hierarchy Level	us-gaap:FairValueInputsLevel2Member	us-gaap:FairValueInputsLevel2Member