Accumulated Other Comprehensive Loss (Reclassifications Out of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Schedule of Reclassifciations Out of Accumulated Other Comprehensive Income [Line Items]
Income (loss) before income taxes		$ (52,575)	$ (19,590)
Income tax provision (benefit)		1,464	5,442
Net loss		(51,111)	(14,148)
Reclassifications Out of Accumulated Other Comprehensive Income (Loss)
Schedule of Reclassifciations Out of Accumulated Other Comprehensive Income [Line Items]
Net loss	[1]	556	11,631
Reclassifications Out of Accumulated Other Comprehensive Income (Loss) | Defined Benefit Plan Items
Schedule of Reclassifciations Out of Accumulated Other Comprehensive Income [Line Items]
Amortization of prior-service cost	[1],[2]	(228)	(228)
Income (loss) before income taxes	[1]	(228)	(228)
Income tax provision (benefit)	[1]	57	57
Net loss	[1]	(171)	(171)
Reclassifications Out of Accumulated Other Comprehensive Income (Loss) | Cash Flow Hedges
Schedule of Reclassifciations Out of Accumulated Other Comprehensive Income [Line Items]
Interest payments		969	182
Income (loss) before income taxes	[1]	969	182
Income tax provision (benefit)	[1]	(242)	(46)
Net loss	[1]	$ 727	136
Reclassifications Out of Accumulated Other Comprehensive Income (Loss) | Foreign Currency Translation Adjustment
Schedule of Reclassifciations Out of Accumulated Other Comprehensive Income [Line Items]
Realized loss on pre-existing investment			(11,666)
Income (loss) before income taxes	[1]		11,666
Income tax provision (benefit)	[1]		0
Net loss	[1]		$ 11,666

[1] Amounts in parentheses indicate credits to profit/loss

[2] This accumulated other comprehensive loss component is included in the computation of net periodic benefit cost.