Accumulated Other Comprehensive Income (Loss) (Components of OCI) (Details 1) - USD ($) $ in Thousands		3 Months Ended				6 Months Ended
		Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019
Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), before tax		$ 17,320		$ (12,470)		$ (20,743)	$ (4,799)
Other Comprehensive Income (Loss), income tax		(252)		375		(132)	994
Other Comprehensive Income (Loss), Net of Tax		17,068	$ (37,943)	(12,095)	$ 8,290	(20,875)	(3,805)
Foreign Currency Translation Adjustment [Member]
Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax						(20,971)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax						0
Other Comprehensive Income (Loss), before tax		16,405		(11,104)		(20,971)	(1,071)
Other Comprehensive Income (Loss), income tax		0		0		0	0
Other Comprehensive Income (Loss), Net of Tax		16,405		(11,104)		(20,971)	(1,071)
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		1,058		(1,406)		1,949	(3,301)
Reclassification from AOCI, Current Period, Tax		(285)		380		(526)	891
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax		773		(1,026)		1,423	(2,410)
Other Comprehensive Income (Loss), before tax		1,058		(1,406)		1,949	(3,301)
Other Comprehensive Income (Loss), income tax		(285)		380		(526)	891
Other Comprehensive Income (Loss), Net of Tax		773		(1,026)		1,423	(2,410)
Net Prior Service (Credit) Cost [Member]
Other Comprehensive Income (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	[1]	668		(931)		1,339	(2,278)
Reclassification from AOCI, Current Period, Tax		(181)		251		(362)	615
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax		487		(680)		977	(1,663)
Net Actuarial Gain [Member]
Other Comprehensive Income (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	[1]	390		(475)		610	(1,023)
Reclassification from AOCI, Current Period, Tax		(104)		129		(164)	276
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax		286		(346)		446	(747)
Cash Flow Hedges [Member]
Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax						(1,487)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax						160
Other Comprehensive Income (Loss), before tax		(143)		40		(1,721)	(427)
Other Comprehensive Income (Loss), income tax		33		(5)		394	103
Other Comprehensive Income (Loss), Net of Tax		$ (110)		$ 35		$ (1,327)	$ (324)

[1] These accumulated other comprehensive income components are included in the computation of net periodic pension and postretirement plan cost (see Note 12) and are included in non-operating pension and postretirement benefit income in the Company’s Condensed Consolidated Statements of Operations.