Employee Benefit Plans (Defined Contribution Plans) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 26, 2022	Mar. 27, 2021
Non-Collective-Bargaining Plan
Defined Contribution Plans [Line Items]
Percentage of employees covered	88.00%
Employer matching contribution, percentage	1.00%
Employer matching contribution, discretionary percentage	2.00%
Maximum annual contribution per employee, percentage	3.00%
Cost recognized	$ 223	$ 224
Collective-Bargaining Plan
Defined Contribution Plans [Line Items]
Percentage of employees covered	12.00%
Maximum annual contribution per employee, percentage	2.75%
Cost recognized	$ 25	$ 21