Pensions and Other Postretirement Benefits (Components of Net Periodic Cost of Pension and Other Postretirement Benefit Plans) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit cost	$ 241	$ 468	$ 738
Pension Plans | United States
Defined Benefit Plan Disclosure [Line Items]
Annual service cost	0	0	0
Interest cost	65	57	70
Expected return on plan assets	0	0	0
Amortization of actuarial losses	22	27	109
Amortization of transition obligation	0	0	0
Curtailment and settlement losses	0	0	0
Net periodic benefit cost	87	84	179
Pension Plans | Foreign Plan
Defined Benefit Plan Disclosure [Line Items]
Annual service cost	308	379	402
Interest cost	395	353	442
Expected return on plan assets	(454)	(393)	(442)
Amortization of actuarial losses	736	459	286
Amortization of transition obligation	(40)	(8)	5
Curtailment and settlement losses	(512)	(108)	0
Net periodic benefit cost	433	682	693
OPEB Plans
Defined Benefit Plan Disclosure [Line Items]
Annual service cost	29	36	123
Interest cost	67	68	133
Amortization of actuarial losses	3	20	137
Net periodic benefit cost	$ 99	$ 124	$ 393