Significant Accounting Policies - Fair Value Measurements (Details) - USD ($) $ in Thousands	Mar. 26, 2023	Dec. 25, 2022
Fair Value, Recurring | Level 1
Financial assets:
Cash surrender value of life insurance policies	$ 30,337	$ 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	274	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	30,337	30,120
Interest rate swaps	$ 274	$ 986