Accumulated Other Comprehensive Income (Loss) (Components of OCI) (Details 1) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), before tax		$ (38,063)	$ 7,671
Other Comprehensive Income (Loss), income tax		120	619
Other Comprehensive Income (Loss), Net of Tax		(37,943)	8,290
Foreign Currency Translation Adjustment [Member]
Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax		(37,376)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax		0
Other Comprehensive Income (Loss), before tax		(37,376)	10,033
Other Comprehensive Income (Loss), income tax		0	0
Other Comprehensive Income (Loss), Net of Tax		(37,376)	10,033
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		891	(1,895)
Reclassification from AOCI, Current Period, Tax		(241)	511
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax		650	(1,384)
Other Comprehensive Income (Loss), before tax		891	(1,895)
Other Comprehensive Income (Loss), income tax		(241)	511
Other Comprehensive Income (Loss), Net of Tax		650	(1,384)
Net Prior Service (Credit) Cost [Member]
Other Comprehensive Income (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	[1]	671	(1,347)
Reclassification from AOCI, Current Period, Tax		(181)	364
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax		490	(983)
Net Actuarial Gain [Member]
Other Comprehensive Income (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	[1]	220	(548)
Reclassification from AOCI, Current Period, Tax		(60)	147
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax		160	(401)
Cash Flow Hedges [Member]
Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax		(1,253)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax		36
Other Comprehensive Income (Loss), before tax		(1,578)	(467)
Other Comprehensive Income (Loss), income tax		361	108
Other Comprehensive Income (Loss), Net of Tax		$ (1,217)	$ (359)

[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.