Significant Accounting Policies - Fair Value Measurements (Details) - USD ($) $ in Thousands	Jun. 26, 2022	Dec. 26, 2021
Fair Value, Recurring | Level 1
Financial assets:
Cash surrender value of life insurance policies	$ 29,514	$ 41,904
Interest rate swaps	0
Financial liabilities:
Interest rate swaps		0
Fair Value, Recurring | Level 2
Financial assets:
Cash surrender value of life insurance policies	0	0
Interest rate swaps	672
Financial liabilities:
Interest rate swaps		5,536
Fair Value, Recurring | Level 3
Financial assets:
Cash surrender value of life insurance policies	0	0
Interest rate swaps	0
Financial liabilities:
Interest rate swaps		0
Carrying Value
Financial assets:
Cash surrender value of life insurance policies	29,514	41,904
Interest rate swaps	$ 672
Financial liabilities:
Interest rate swaps		$ 5,536