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Marketable Securities - SERP Investments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 25, 2021	Dec. 26, 2020
Net Investment Income [Line Items]
Investment Income (Loss) and Interest Expense	$ (82)	$ 5,007	$ 3,817
Supplemental Employee Retirement Plan [Member]
Net Investment Income [Line Items]
Investment Income (Loss) and Interest Expense	$ (3,800)	$ 3,400	$ 3,300

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Amount after accretion (amortization) of discount (premium), and investment expense, of interest income and dividend income on nonoperating securities plus amount of the cost of borrowed funds accounted for as interest expense.

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