Fair Value Measurements (Fair Value Measurements - Carrying Amount and Fair Value) (Details) - USD ($) $ in Thousands	Jun. 25, 2022	Dec. 25, 2021
Financial liabilities:
Finance leases, including current portion	$ 13,108	$ 13,787
Carrying Amount
Financial assets:
Cash and cash equivalents	893	1,471
Financial liabilities:
Long-term debt, including current portion	72,267	63,275
Finance leases, including current portion	13,108	13,787
Interest rate swaps	0	210
Fair Value
Financial assets:
Cash and cash equivalents	893	1,471
Financial liabilities:
Long-term debt, including current portion	69,285	61,721
Finance leases, including current portion	12,886	16,389
Interest rate swaps	$ 0	$ 210