Benefit Plans (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 26, 2022	Mar. 27, 2021
Pension Benefits
Components of net periodic benefit cost (income) [Abstract]
Interest cost	$ 394	$ 313
Expected return on plan assets	(967)	(904)
Amortization of net loss (gain)	244	378
Net periodic benefit income	(329)	(213)
Other Benefits
Components of net periodic benefit cost (income) [Abstract]
Interest cost	103	87
Amortization of net loss (gain)	(58)	(31)
Service cost	72	65
Amortization of prior service credit	(118)	(118)
Net periodic benefit income	$ (1)	$ 3