Derivatives and Hedge Accounting - Summary of Effect of Foreign Currency Exchange Contracts (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]
Gain/(loss) recognized in consolidated statements of income	$ 1,359	$ 1,202	$ 2,736	$ 2,462
Derivatives in cash flow hedging relationships | Designated as Hedging Instrument | Foreign currency exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized gain/(loss) recognized in AOCI	7,721	3,268	(7,125)	9,205
(Loss)/Gain on foreign currency exchange contracts | Derivatives not designated as hedging instruments | Foreign currency exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(loss) recognized in consolidated statements of income	$ 3,204	$ 2,923	$ (1,011)	$ 4,319