Fair Value Measurements (Carrying Amount and Fair Value) (Details) - USD ($) $ in Thousands	Sep. 24, 2022	Dec. 25, 2021
Financial liabilities:
Finance leases, including current portion	$ 12,906	$ 13,787
Carrying Amount
Financial assets:
Cash and cash equivalents	961	1,471
Financial liabilities:
Long-term debt, including current portion	80,665	63,275
Finance leases, including current portion	12,906	13,787
Interest rate swaps	0	210
Fair Value
Financial assets:
Cash and cash equivalents	961	1,471
Financial liabilities:
Long-term debt, including current portion	73,644	61,721
Finance leases, including current portion	12,622	16,389
Interest rate swaps	$ 0	$ 210