Pension and Postretirement Benefit Obligations - Components of Net Periodic Postretirement Benefit Cost (Details) - Postretirement Benefits - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2023	Sep. 30, 2022	Sep. 29, 2023	Sep. 30, 2022
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 294	$ 383	$ 882	$ 1,150
Interest cost	697	474	2,092	1,423
Recognized net actuarial loss	0	92	0	275
Net periodic postretirement benefit cost	$ 991	$ 949	$ 2,974	$ 2,848