Significant Accounting Policies - Fair Value Measurements (Details) - USD ($) $ in Thousands	Sep. 24, 2023	Dec. 25, 2022
Fair Value, Recurring | Level 1
Financial assets:
Cash surrender value of life insurance policies	$ 26,984	$ 30,120
Interest rate swaps	0	0
Fair Value, Recurring | Level 2
Financial assets:
Cash surrender value of life insurance policies	0	0
Interest rate swaps	785	986
Fair Value, Recurring | Level 3
Financial assets:
Cash surrender value of life insurance policies	0	0
Interest rate swaps	0	0
Carrying Value
Financial assets:
Cash surrender value of life insurance policies	26,984	30,120
Interest rate swaps	$ 785	$ 986