Derivative Instruments, Hedging Activities and Fair Value - Derivatives Designated as Hedging Instruments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Derivative [Line Items]
Product Revenues	$ 509,398	$ 423,155	$ 1,355,520	$ 1,103,955
Interest Expense	(15,794)	(12,819)	(43,396)	(24,429)
Gain or (loss) reclassified from AOCI into income	(1,225)		(1,199)
Interest rate swaps | Amount Reclassified from Accumulated Other Comprehensive Loss | Effective Portion of Deriviatives Designated as Hedging Instruments
Derivative [Line Items]
Interest Expense	(739)	76	(1,849)	648
Income (loss) from discontinued business	0	0	0	(2,741)
Cross-currency interest rate swaps | Amount Reclassified from Accumulated Other Comprehensive Loss | Effective Portion of Deriviatives Designated as Hedging Instruments
Derivative [Line Items]
Interest Expense	(312)	(291)	(912)	(908)
Foreign currency exchange forward contracts | Amount Reclassified from Accumulated Other Comprehensive Loss | Effective Portion of Deriviatives Designated as Hedging Instruments
Derivative [Line Items]
Cost of services sold	0	0	0	44
Product Revenues | Interest rate swaps
Derivative [Line Items]
Gain or (loss) reclassified from AOCI into income	0
Gain or (loss) reclassified from AOCI into income		0
Product Revenues | Foreign exchange contracts
Derivative [Line Items]
Gain or (loss) reclassified from AOCI into income	(174)		1,562
Gain or (loss) reclassified from AOCI into income		(512)		977
Amount excluded from effectiveness testing recognized in earnings	12		208
Amount excluded from effectiveness testing recognized in earnings		86		403
Derivative Instruments, Loss Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing	3		24
Product Revenues | Cross-currency interest rate swaps
Derivative [Line Items]
Gain or (loss) reclassified from AOCI into income	0
Gain or (loss) reclassified from AOCI into income		0
Interest Expense | Interest rate swaps
Derivative [Line Items]
Gain or (loss) reclassified from AOCI into income	(739)		(1,849)
Gain or (loss) reclassified from AOCI into income		(76)		(648)
Interest Expense | Foreign exchange contracts
Derivative [Line Items]
Gain or (loss) reclassified from AOCI into income	0
Gain or (loss) reclassified from AOCI into income		0
Amount excluded from effectiveness testing recognized in earnings	0
Amount excluded from effectiveness testing recognized in earnings		0
Interest Expense | Cross-currency interest rate swaps
Derivative [Line Items]
Gain or (loss) reclassified from AOCI into income	(312)		(912)
Gain or (loss) reclassified from AOCI into income	312	291		908
Cost of services and products sold | Foreign currency exchange forward contracts
Derivative [Line Items]
Gain or (loss) reclassified from AOCI into income	(174)		1,562
Amount of Gain Recognized in Income on Derivatives	(12,279)	10,642	(5,001)	15,735
Product Revenues
Derivative [Line Items]
Product Revenues	125,119	106,488	334,324	319,765
Cost of services sold	99,043	71,970	257,512	220,634
Products And Services, Service Revenue
Derivative [Line Items]
Product Revenues	384,279	316,667	1,021,196	784,190
Cost of services sold	$ 313,136	239,519	$ 835,277	608,230
Gain or (loss) reclassified from AOCI into income		$ 0		$ (44)