Accumulated Other Comprehensive Income (Loss) (Components of OCI) (Details 1) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), before tax		$ 7,671	$ 10,509
Other Comprehensive Income (Loss), income tax		619	303
Other Comprehensive Income (Loss), Net of Tax		8,290	10,812
Foreign Currency Translation Adjustment [Member]
Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax		10,033
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax		0
Other Comprehensive Income (Loss), before tax		10,033	11,564
Other Comprehensive Income (Loss), income tax		0	0
Other Comprehensive Income (Loss), Net of Tax		10,033	11,564
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		(1,895)	(1,291)
Reclassification from AOCI, Current Period, Tax		511	348
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax		(1,384)	(943)
Other Comprehensive Income (Loss), before tax		(1,895)	(1,291)
Other Comprehensive Income (Loss), income tax		511	348
Other Comprehensive Income (Loss), Net of Tax		(1,384)	(943)
Net Prior Service (Credit) Cost [Member]
Other Comprehensive Income (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	[1]	(1,347)	76
Reclassification from AOCI, Current Period, Tax		364	(21)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax		(983)	55
Net Actuarial Gain [Member]
Other Comprehensive Income (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	[1]	(548)	(1,367)
Reclassification from AOCI, Current Period, Tax		147	369
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax		(401)	(998)
Cash Flow Hedges [Member]
Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax		(305)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax		(54)
Other Comprehensive Income (Loss), before tax		(467)	236
Other Comprehensive Income (Loss), income tax		108	(45)
Other Comprehensive Income (Loss), Net of Tax		$ (359)	$ 191

[1] These accumulated other comprehensive income components are components 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.