Financial Instruments - Effect of Derivative Instruments on the Consolidated Statements of Operations and the Consolidated Statements of Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Product revenues		$ 1,863,864	$ 1,503,742	$ 1,347,672
Interest expense		(59,689)	(36,586)	(21,531)
Income (loss) from discontinued business		(2,745)	27,531	43,942
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax		(2,578)	(2,934)
Foreign currency exchange forward contracts | Product revenues / Cost of services and products sold
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax		1,026	506
Derivative Not Designated as Hedging Instruments
Amount of Gain (Loss) Recognized in Income on Derivative for the Twelve Months Ended December 31		(9,052)	6,807	17,262
Foreign currency exchange forward contracts | Retained Earnings
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax		0	0
Interest rate swaps | Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax		0
Gain (Loss) on Discontinuation of Cash Flow Hedge Due to Forecasted Transaction Probable of Not Occurring, Net			0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax			0	0
Interest rate swaps | Interest expense
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax		(2,589)	520
Gain (Loss) on Discontinuation of Cash Flow Hedge Due to Forecasted Transaction Probable of Not Occurring, Net			0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax			520	1,108
Interest rate swaps | Cost of Goods and Service Benchmark [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Discontinuation of Cash Flow Hedge Due to Forecasted Transaction Probable of Not Occurring, Net			0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax			0	0
Interest rate swaps | Discontinued Operation, Gain (Loss) From Disposal Of Discontinued Operation [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax		0	(2,741)
Gain (Loss) on Discontinuation of Cash Flow Hedge Due to Forecasted Transaction Probable of Not Occurring, Net	$ (2,700)		(2,741)
Cross-currency interest rate swaps | Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax		0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax			0	0
Cross-currency interest rate swaps | Interest expense
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax		(1,015)	(1,219)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax			(1,219)	(1,264)
Cross-currency interest rate swaps | Cost of Goods and Service Benchmark [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax			0	0
Cross-currency interest rate swaps | Discontinued Operation, Gain (Loss) From Disposal Of Discontinued Operation [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax			0
Foreign Exchange Contract [Member] | Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax		1,026
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease) Based On Amortization Approach, before Adjustments and Tax		31
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), before Adjustments and Tax		197
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax			550	374
Amount of Gain (Loss) Recognized in Income on Derivative—Ineffective Portion and Amount Excluded from Effectiveness Testing			509	(440)
Foreign Exchange Contract [Member] | Interest expense
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax		0
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease) Based On Amortization Approach, before Adjustments and Tax		0
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), before Adjustments and Tax		0
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax			0	0
Amount of Gain (Loss) Recognized in Income on Derivative—Ineffective Portion and Amount Excluded from Effectiveness Testing			0	0
Foreign Exchange Contract [Member] | Cost of Goods and Service Benchmark [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax			(44)	0
Amount of Gain (Loss) Recognized in Income on Derivative—Ineffective Portion and Amount Excluded from Effectiveness Testing			0	1
Foreign Exchange Contract [Member] | Discontinued Operation, Gain (Loss) From Disposal Of Discontinued Operation [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax			0
Other Comprehensive Income (Loss), Derivative, Excluded Component, Increase (Decrease), before Adjustments and Tax			0
Product
Derivative Instruments, Gain (Loss) [Line Items]
Product revenues		431,574	415,115	389,005
Cost of services and products sold		337,028	300,364	264,641
Products And Services, Service Revenue [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Cost of services and products sold		$ 1,163,783	$ 843,926	$ 747,899