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Marketable Securities - Amortized Cost (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 25, 2021
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Amortized Cost	$ 190,025	$ 196,878
Gross Unrealized Holding Gains	2,110	4,755
Gross Unrealized Holding Losses	(10,901)	(2,397)
Fair Value	181,234
Bonds [Member]
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Amortized Cost	190,025	151,947
Gross Unrealized Holding Gains	2,110	4,753
Gross Unrealized Holding Losses	(10,901)	(2,384)
Fair Value	$ 181,234	154,315
Commercial Paper [Member]
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Amortized Cost		44,931
Gross Unrealized Holding Gains		2
Gross Unrealized Holding Losses		(13)
Fair Value		$ 44,920

X

- Definition

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on 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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