Benefit Plans (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 25, 2022	Jun. 26, 2021	Jun. 25, 2022	Jun. 26, 2021
Pension Benefits
Components of net periodic benefit cost (income) [Abstract]
Interest cost	$ 393	$ 313	$ 787	$ 626
Expected return on plan assets	(967)	(904)	(1,934)	(1,808)
Amortization of net loss (gain)	243	379	487	757
Net periodic benefit income	(331)	(212)	(660)	(425)
Other Benefits
Components of net periodic benefit cost (income) [Abstract]
Interest cost	103	87	206	174
Amortization of net loss (gain)	(60)	(33)	(118)	(64)
Service cost	72	65	144	130
Amortization of prior service credit	(79)	(117)	(197)	(235)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment	(1,756)	0	(1,756)	0
Net periodic benefit income	$ (1,720)	$ 2	$ (1,721)	$ 5