Pensions and Other Postretirement Benefits - (Schedule of Net Pension and Other Retirement Plan Costs) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2023	Jul. 02, 2022	Jul. 01, 2023	Jul. 02, 2022
Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Net service cost	$ 68	$ 81	$ 137	$ 165
Interest cost	192	120	382	243
Expected return on plan assets	(214)	(119)	(426)	(242)
Amortization of actuarial losses (gains)	7	72	15	146
Net periodic benefit cost	53	154	108	312
OPEB Plans
Defined Benefit Plan Disclosure [Line Items]
Net service cost	4	7	8	14
Interest cost	28	17	56	34
Expected return on plan assets		0	0	0
Amortization of actuarial losses (gains)	(6)	1	(12)	2
Net periodic benefit cost	$ 26	$ 25	$ 52	$ 50