Marketable Securities - Fair Value (Details) - USD ($) $ in Thousands	Mar. 26, 2022	Dec. 25, 2021
Marketable Securities [Abstract]
Equity securities	$ 6,295	$ 6,509
Available-for-sale securities	192,461
Marketable securities	$ 198,756	$ 205,744
Equity Securities, FV-NI, Fair Value by Fair Value Hierarchy Level	us-gaap:FairValueInputsLevel1Member	us-gaap:FairValueInputsLevel1Member
Bonds [Member]
Marketable Securities [Abstract]
Available-for-sale securities	$ 147,602	$ 154,315
Debt Securities, Available-for-Sale, Fair Value by Fair Value Hierarchy Level	us-gaap:FairValueInputsLevel2Member	us-gaap:FairValueInputsLevel2Member
Commercial Paper [Member]
Marketable Securities [Abstract]
Available-for-sale securities	$ 44,859	$ 44,920
Debt Securities, Available-for-Sale, Fair Value by Fair Value Hierarchy Level	us-gaap:FairValueInputsLevel2Member	us-gaap:FairValueInputsLevel2Member

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Indicates level within fair value hierarchy of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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Amount of investment in marketable security.

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