Derivatives - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Derivative Instruments,Gain (Loss) [Line Items]
Net gain (loss) on foreign currency exchange contracts	$ 368,000	$ 69,000	$ (8,000)	$ 603,000
Not Designated as Hedging Instrument | Foreign Currency Exchange Contracts | Other Income (Expense), Net
Derivative Instruments,Gain (Loss) [Line Items]
Net gain (loss) on foreign currency exchange contracts	$ 400,000	$ 100,000	$ (8,000)	$ 600,000