Pension and Other Postretirement Benefits - Other Postretirement Benefits (Details) - Other Postretirement Benefit Plan - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 25, 2022	Sep. 26, 2021	Sep. 25, 2022	Sep. 26, 2021
Pension Benefits
Service cost	$ 11	$ 14	$ 34	$ 40
Interest cost	183	141	548	423
Amortization of actuarial loss	823	851	2,470	2,555
Amortization of prior service credit	0	(837)	(368)	(2,509)
Net periodic postretirement benefit cost	$ 1,017	$ 169	$ 2,684	$ 509