Pensions and Other Postretirement Benefits - (Schedule of Net Pension and Other Retirement Plan Costs) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Oct. 01, 2022	Sep. 30, 2023	Oct. 01, 2022
Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Net service cost	$ 67	$ 79	$ 204	$ 244
Interest cost	193	117	575	360
Expected return on plan assets	(216)	(116)	(642)	(358)
Amortization of actuarial losses (gains)	7	69	22	215
Net periodic benefit cost	51	149	159	461
OPEB Plans
Defined Benefit Plan Disclosure [Line Items]
Net service cost	4	7	12	21
Interest cost	28	17	84	51
Expected return on plan assets		0	0	0
Amortization of actuarial losses (gains)	(6)	1	(18)	3
Net periodic benefit cost	$ 26	$ 25	$ 78	$ 75