Pension and Other Postretirement Obligations (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 02, 2023	Jul. 03, 2022	Jul. 02, 2023	Jul. 03, 2022
Pension Obligations
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 844	$ 819	$ 1,534	$ 1,730
Interest cost	3,810	2,287	7,554	4,592
Expected return on plan assets	(4,329)	(3,798)	(8,438)	(7,761)
Amortization of prior service cost	44	44	87	91
Actuarial losses (gains)	(232)	224	(458)	460
Net periodic benefit cost (income)	137	(424)	279	(888)
Other Postretirement Obligations
Defined Benefit Plan Disclosure [Line Items]
Service cost	3	6	6	12
Interest cost	252	193	503	388
Expected return on plan assets	0	0	0	0
Amortization of prior service cost	0	0	0	0
Actuarial losses (gains)	(191)	(20)	(382)	(40)
Net periodic benefit cost (income)	$ 64	$ 179	$ 127	$ 360