Derivatives - Gain (Loss) in the Consolidated Statements of Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Not designated as hedging instrument | Foreign currency forward contracts | Other income (expense)
Derivative [Line Items]
Gain (loss) on derivative	$ (1,294)	$ 2,402	$ 1,051	$ 1,647