Accumulated Other Comprehensive Income (Loss) (Components of OCI) (Details 1) - USD ($) $ in Thousands		3 Months Ended						9 Months Ended
		Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023
Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), before tax		$ 15,882			$ (33,361)			$ (18,124)	$ (42,105)
Other Comprehensive Income (Loss), income tax		3,803			3,468			10,002	8,651
Other Comprehensive Income (Loss), Net of Tax		19,685	$ (5,315)	$ (22,492)	(29,893)	$ (4,146)	$ 585	(8,122)	(33,454)
Foreign Currency Translation Adjustment [Member]
Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, before Tax		31,469			(19,474)			21,702	(8,096)
Other Comprehensive Income (Loss) before Reclassifications, Tax		0			0			0	0
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax		31,469			(19,474)			21,702	(8,096)
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax		(765)			0			(765)	0
Reclassification from AOCI, Current Period, Tax		0			0			0	0
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax		(765)			0			(765)	0
Other Comprehensive Income (Loss), before tax		30,704			(19,474)			20,937	(8,096)
Other Comprehensive Income (Loss), income tax		0			0			0	0
Other Comprehensive Income (Loss), Net of Tax		30,704			(19,474)			20,937	(8,096)
Pension and Other Postretirement Plans [Member]
Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax								0
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax		(12,847)			(10,063)			(38,543)	(30,443)
Reclassification from AOCI, Current Period, Tax		3,288			2,589			9,867	7,831
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax		(9,559)			(7,474)			(28,676)	(22,612)
Other Comprehensive Income (Loss), before tax		(12,847)			(10,063)			(38,543)	(30,443)
Other Comprehensive Income (Loss), income tax		3,288			2,589			9,867	7,831
Other Comprehensive Income (Loss), Net of Tax		(9,559)			(7,474)			(28,676)	(22,612)
Net Prior Service (Credit) Cost [Member]
Other Comprehensive Income (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	[1]	(487)			410			(1,463)	1,230
Reclassification from AOCI, Current Period, Tax		124			(105)			374	(316)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax		(363)			305			(1,089)	914
Net Actuarial Gain [Member]
Other Comprehensive Income (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	[1]	(12,360)			(10,473)			(37,080)	(31,673)
Reclassification from AOCI, Current Period, Tax		3,164			2,694			9,493	8,147
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax		(9,196)			(7,779)			(27,587)	(23,526)
Cash Flow Hedges [Member]
Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax								(22)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax								(361)
Other Comprehensive Income (Loss), before tax		(1,975)			(3,824)			(518)	(3,566)
Other Comprehensive Income (Loss), income tax		515			879			135	820
Other Comprehensive Income (Loss), Net of Tax		$ (1,460)			$ (2,945)			$ (383)	$ (2,746)

[1] These accumulated other comprehensive income (loss) components are included in the computation of net periodic pension and postretirement plan cost (see Note 11) and are included in non-operating pension and postretirement benefit income in the Company’s Condensed Consolidated Statements of Operations.