Components of Accumulated Other Comprehensive Loss - Reclassification out of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Other Operating Income (Expense), Net	$ (3,633)			$ (383)			$ (9,074)	$ (409)
Product revenues	509,398			423,155			1,355,520	1,103,955
Interest expense	15,794			12,819			43,396	24,429
Income from continuing operations before income taxes	(8,267)			32,857			(28,719)	49,749
Income tax expense (benefit)	(1,654)			12,601			(4,640)	17,814
Net income (loss)	(8,339)	$ (9,455)	$ 1,227	437,857	$ 10,929	$ 22,537	(16,567)	471,323
Amount Reclassified from Accumulated Other Comprehensive Loss | Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Other Operating Income (Expense), Net	0
Amount Reclassified from Accumulated Other Comprehensive Loss | Cumulative Unrecognized Actuarial Losses on Pension Obligations
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Income from continuing operations before income taxes	5,075			4,782			20,488	15,082
Income tax expense (benefit)	(323)			(340)			(2,356)	(1,061)
Net income (loss)	4,752			4,442			18,132	14,021
Amount Reclassified from Accumulated Other Comprehensive Loss | Effective Portion of Deriviatives Designated as Hedging Instruments
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Income from continuing operations before income taxes	1,225			(297)			1,199	2,068
Income tax expense (benefit)	(408)			(21)			(595)	(664)
Net income (loss)	817			(318)			604	1,404
Amount Reclassified from Accumulated Other Comprehensive Loss | Effective Portion of Deriviatives Designated as Hedging Instruments | Foreign currency exchange forward contracts
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Other Operating Income (Expense), Net				(154)			12,906	(2,425)
Discontinued Operation, Gain From Disposal Of Discontinued Operation, Before Income Tax	0			662			0	662
Product revenues	174			(512)			(1,562)	(977)
Cost of services sold	0			0			0	44
Amount Reclassified from Accumulated Other Comprehensive Loss | Effective Portion of Deriviatives Designated as Hedging Instruments | Cross currency interest rate swaps
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	312			291			912	908
Amount Reclassified from Accumulated Other Comprehensive Loss | Effective Portion of Deriviatives Designated as Hedging Instruments | Interest rate swaps
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	739			(76)			1,849	(648)
Income (loss) from discontinued business	0			0			0	2,741
Amount Reclassified from Accumulated Other Comprehensive Loss | Actuarial losses
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Defined benefit pension income (expense)	4,962			4,721			14,799	14,761
Amount Reclassified from Accumulated Other Comprehensive Loss | Prior service costs (benefits)
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Defined benefit pension income (expense)	0			0				0
Amount Reclassified from Accumulated Other Comprehensive Loss | Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Defined benefit pension income (expense)	113			61			326	192
Amount Reclassified from Accumulated Other Comprehensive Loss | AOCI Attributable to Parent
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Defined benefit pension income (expense)	$ 0			$ 0			0	$ 129
Amount Reclassified from Accumulated Other Comprehensive Loss | Pension Liability Transfer - Discontinued Businesses
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Defined benefit pension income (expense)							$ 5,363