Derivative Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2018

Derivative Financial Instruments

Schedule of notional amount and fair value of derivatives

	September 30, 2018					December 31, 2017
	Fair Value		Maturity Dates	Notional Amount		Fair Value		Maturity Dates	Notional Amount
	(in thousands)
Foreign currency exchange forwards	$	(2)	October 2018	$	4,584	$	—	January 2018	$	622

Schedule of gains and (losses) and weighted average notional amount of derivatives

	Three months ended September 30, 2018				Three months ended September 30, 2017
	Gains (Losses)		Weighted average notional amount		Gains (Losses)		Weighted average notional amount
	(in thousands)
Foreign currency exchange forwards	$	132	$	4,448	$	(10)	$	361

	Nine months ended September 30, 2018				Nine months ended September 30, 2017
	Gains (Losses)		Weighted average notional amount		Gains (Losses)		Weighted average notional amount
	(in thousands)
Foreign currency exchange forwards	$	348	$	2,869	$	(9)	$	317