Marketable Securities - Fair Value (Details) - USD ($) $ in Thousands	Sep. 28, 2024	Dec. 30, 2023
Marketable Securities
Equity securities	$ 5,948	$ 4,910
Available-for-sale securities	225,487
Marketable securities	$ 231,435	$ 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	$ 178,895	$ 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	$ 46,592	$ 45,808
Debt Securities, Available-for-Sale, Fair Value by Fair Value Hierarchy Level	us-gaap:FairValueInputsLevel2Member	us-gaap:FairValueInputsLevel2Member