Accumulated Other Comprehensive Income (Loss) (Reclassifications out of AOCI) (Details 3) - USD ($) $ in Thousands		3 Months Ended				6 Months Ended
		Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Interest expense		$ 11,774		$ 15,973		$ 26,068	$ 27,390
Provision for (Benefit from) Income Taxes		41,800		(21,400)		61,000	14,200
Net of Tax		(124,171)	$ (52,977)	66,615	$ (96,566)	(177,148)	(29,951)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Net of Tax		(7,680)		(12,740)		(15,547)	(25,217)
Foreign Currency Translation Adjustment [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Reclassifications, net of tax						0
Pension and Other Postretirement Plans [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Reclassifications, before tax		(10,023)		(17,366)		(20,380)	(34,424)
Provision for (Benefit from) Income Tax		2,578		4,475		5,242	8,872
Reclassifications, net of tax		(7,445)		(12,891)		(15,138)	(25,552)
Net Prior Service (Credit) Cost [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Reclassifications, before tax	[1]	411		716		820	1,432
Provision for (Benefit from) Income Tax		(106)		(185)		(211)	(369)
Reclassifications, net of tax		305		531		609	1,063
Net Actuarial Gain [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Reclassifications, before tax	[1]	(10,434)		(18,082)		(21,200)	(35,856)
Provision for (Benefit from) Income Tax		2,684		4,660		5,453	9,241
Reclassifications, net of tax		(7,750)		(13,422)		(15,747)	(26,615)
Cash Flow Hedges [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Reclassifications, net of tax						(409)
Cash Flow Hedges [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Interest expense		$ (235)		$ 151		$ (409)	$ 335

[1] These accumulated other comprehensive income 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.