Derivative Instruments, Hedging Activities and Fair Value - Derivatives Designated as Hedging Instruments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Derivative [Line Items]
Product Revenues	$ 447,281	$ 350,898	$ 846,122	$ 680,800
Interest Expense	(14,953)	(6,103)	(27,602)	(11,610)
Income From Discontinued Businesses	(524)	(9,936)	(299)	(23,686)
Amount of gain or reclassified from AOCI into income	(695)		26
Interest rate swaps | Amount Reclassified from Accumulated Other Comprehensive Loss | Effective Portion of Deriviatives Designated as Hedging Instruments
Derivative [Line Items]
Interest Expense	(732)	271	(1,110)	572
Income from discontinued business	0	(2,741)	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	(295)	(303)	(600)	(617)
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	44	0	44
Product Revenues | Interest rate swaps
Derivative [Line Items]
Amount of gain or reclassified from AOCI into income	0
Amount of gain or reclassified from AOCI into income		0
Product Revenues | Foreign exchange contracts
Derivative [Line Items]
Amount of gain or reclassified from AOCI into income	332		1,736
Amount of gain or reclassified from AOCI into income		433	465
Amount excluded from effectiveness testing recognized in earnings	13		196
Amount excluded from effectiveness testing recognized in earnings		238	316
Derivative Instruments, Loss Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing	21		21
Product Revenues | Cross-currency interest rate swaps
Derivative [Line Items]
Amount of gain or reclassified from AOCI into income	0
Amount of gain or reclassified from AOCI into income		0
Interest Expense | Interest rate swaps
Derivative [Line Items]
Amount of gain or reclassified from AOCI into income	(732)		(1,110)
Amount of gain or reclassified from AOCI into income		271		572
Interest Expense | Foreign exchange contracts
Derivative [Line Items]
Amount of gain or reclassified from AOCI into income	0
Amount of gain or 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]
Amount of gain or reclassified from AOCI into income	(295)		(600)
Amount of gain or reclassified from AOCI into income		(303)		(617)
Cost of services and products sold | Foreign currency exchange forward contracts
Derivative [Line Items]
Amount of gain or reclassified from AOCI into income	(332)		(1,736)
Amount of Gain Recognized in Income on Derivatives	1,736	2,770	7,278	5,094
Product Revenues
Derivative [Line Items]
Product Revenues	101,703	112,895	209,205	213,277
Cost of services sold	78,320	79,355	158,469	148,664
Products And Services, Service Revenue [Member]
Derivative [Line Items]
Product Revenues	345,578	238,003	636,917	467,523
Cost of services sold	$ 285,822	186,840	$ 522,141	368,711
Amount of gain or reclassified from AOCI into income		$ (44)		$ (44)