Marketable Securities - Amortized Cost (Details) - USD ($) $ in Thousands	Sep. 24, 2022	Dec. 25, 2021
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Amortized Cost	$ 176,375	$ 196,878
Gross Unrealized Holding Gains	1,267	4,755
Gross Unrealized Holding Losses	(11,426)	(2,397)
Fair Value	166,216
Bonds [Member]
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Amortized Cost	149,483	151,947
Gross Unrealized Holding Gains	1,210	4,753
Gross Unrealized Holding Losses	(11,426)	(2,384)
Fair Value	139,267	154,315
Commercial Paper [Member]
Debt Securities, Available-for-sale, Fair Value to Amortized Cost [Abstract]
Amortized Cost	26,892	44,931
Gross Unrealized Holding Gains	57	2
Gross Unrealized Holding Losses		(13)
Fair Value	$ 26,949	$ 44,920

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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Amount, before tax, of unrealized loss 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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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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Amortized cost, after allowance for credit loss, 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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