Pension and Other Postretirement Obligations - Components of Net Periodic Benefit Costs (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 03, 2022	Jul. 04, 2021	Jul. 03, 2022	Jul. 04, 2021
Pension Obligations
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 819	$ 1,155	$ 1,730	$ 2,041
Interest cost	2,287	1,897	4,592	3,703
Expected return on plan assets	(3,798)	(4,527)	(7,761)	(8,195)
Amortization of prior service cost	44	28	91	56
Actuarial losses (gains)	224	976	460	1,955
Net periodic benefit cost (income)	(424)	(471)	(888)	(440)
Other Postretirement Obligations
Defined Benefit Plan Disclosure [Line Items]
Service cost	6	9	12	18
Interest cost	193	186	388	363
Expected return on plan assets	0	0	0	0
Amortization of prior service cost	0	0	0	0
Actuarial losses (gains)	(20)	(5)	(40)	(11)
Net periodic benefit cost (income)	$ 179	$ 190	$ 360	$ 370