Pension and Postretirement Benefits (Change in Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Postretirement Medical Benefits
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax [Abstract]
Balance — January 1	$ (325)	$ (496)
Amortization of net (gain) loss	52	41
Net loss arising during the year	183	37
Amortization of prior service cost	(94)	(93)
Prior service cost arising during the year	122	122	$ 122
Balance — December 31	4	(325)	(496)
United States | Pension Plan
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax [Abstract]
Balance — January 1	(62,602)	(44,455)
Amortization of net (gain) loss	0	(10)
Net loss arising during the year	(4,143)	(20,362)
Settlement loss and other	0	2,140
Amortization of prior service cost	(148)	(141)
Prior service cost arising during the year	0	56
Balance — December 31	(66,597)	(62,602)	(44,455)
Foreign Plan | Pension Plan
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax [Abstract]
Balance — January 1	(59,968)	(42,421)
Amortization of net (gain) loss	2,662	1,631
Net loss arising during the year	5,107	(16,039)
Settlement (gains) losses	61	23
Currency translation impact and other	1,935	(3,126)
Prior service cost arising during the year	296	300	293
Prior service gain (cost) arising during the year	0	(10)
Balance — December 31	$ (50,325)	$ (59,968)	$ (42,421)