Derivative Instruments and Hedging Activities - Effect of Hedge Instruments in Unaudited Condensed Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized holding gains (losses) arising during period	$ (5,794)	$ (1,406)	$ 1,608	$ (47)
Cash flow hedge | Derivative designated as hedging
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized holding gains (losses) arising during period	(5,794)	(1,406)	1,608	(47)
Foreign exchange forward | Cash flow hedge | Derivative designated as hedging
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized holding gains (losses) arising during period	(5,637)	107	3,830	2,194
Interest rate swap | Cash flow hedge | Derivative designated as hedging
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized holding gains (losses) arising during period	$ (157)	$ (1,513)	$ (2,222)	$ (2,241)