Derivative Instruments, Hedging Activities and Fair Value - Effect of Derivative Instruments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Effect of derivative instruments
Amount Recognized in OCI on Derivatives	$ 18	$ (1,483)
Amount Reclassified from AOCI into Income - Effective Portion or Equity	815	(721)
Foreign currency exchange forward contracts
Effect of derivative instruments
Amount Recognized in OCI on Derivatives	(1)	2,037
Foreign currency exchange forward contracts | Cost of services and products sold
Effect of derivative instruments
Amount Reclassified from AOCI into Income - Effective Portion or Equity	(50)	(1,404)
Interest rate swaps
Effect of derivative instruments
Amount Recognized in OCI on Derivatives	19	(3,578)
Interest rate swaps | Interest Expense
Effect of derivative instruments
Amount Reclassified from AOCI into Income - Effective Portion or Equity	865	378
Cross currency interest rate swaps
Effect of derivative instruments
Amount Recognized in OCI on Derivatives	0	58
Cross currency interest rate swaps | Interest Expense
Effect of derivative instruments
Amount Reclassified from AOCI into Income - Effective Portion or Equity	$ 0	$ 305