Derivative Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2015

Derivative Financial Instruments [Abstract]

Summary of Derivative Financial Instruments Notional Amounts on Outstanding Positions

	December 31,
	2015		2014
	(in thousands)
Foreign currency exchange forward contracts by currency:
Japanese Yen	$	98,390	$	44,533
Euro		34,219		134,755
British Pound Sterling		21,859		17,230
South Korean Won		7,981		14,590
Mexican Peso		7,277		13,180
Australian Dollar		6,459		7,913
South African Rand		6,402		4,355
Indian Rupee		5,036		3,356
Canadian Dollar		1,980		3,005
New Taiwan Dollar		1,798		3,229
Swedish Krona		1,655		1,918
Hong Kong Dollar		668		814
Russian Ruble		667		1,838
Singapore Dollar		-		61,887
Chinese Yuan Renminbi		-		5,376
Norwegian Krone		-		917
New Zealand Dollar		-		743
Brazilian Real		-		-
Total notional value, net	$	194,391	$	319,639
Latest maturity date	January 2016		January 2015

Summary of Gain/Loss on Derivative Instruments

	Year Ended December 31,
	2015		2014		2013
	(in thousands)
Foreign currency gain (loss)	$	3,980	$	(1,097)	$	(17,680)
Derivatives not designated as hedging instruments:
Foreign currency exchange forwards gain (loss)		(7,312)		(3,788)		13,002
Foreign currency transaction loss, net	$	(3,332)	$	(4,885)	$	(4,678)