Summary of Derivative Financial Instruments Notional Amounts on Outstanding Positions (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Derivative Financial Instruments Notional Amounts [Line Items]
Total notional value, net	$ 126,459	$ 220,494
Latest maturity date	Aug. 01, 2014	Dec. 01, 2015
British Pound Sterling [Member]
Derivative Financial Instruments Notional Amounts [Line Items]
Total notional value, net	22,736	15,487
Japanese Yen [Member]
Derivative Financial Instruments Notional Amounts [Line Items]
Total notional value, net	19,174	68,707
Singapore Dollar [Member]
Derivative Financial Instruments Notional Amounts [Line Items]
Total notional value, net	16,391	28,225
Russian Ruble [Member]
Derivative Financial Instruments Notional Amounts [Line Items]
Total notional value, net	15,632	17,588
Euro [Member]
Derivative Financial Instruments Notional Amounts [Line Items]
Total notional value, net	12,228	38,577
Mexican Peso [Member]
Derivative Financial Instruments Notional Amounts [Line Items]
Total notional value, net	7,974	18,350
Canadian Dollar [Member]
Derivative Financial Instruments Notional Amounts [Line Items]
Total notional value, net	4,876	3,428
Australian Dollar [Member]
Derivative Financial Instruments Notional Amounts [Line Items]
Total notional value, net	4,669	4,941
South Korean Won [Member]
Derivative Financial Instruments Notional Amounts [Line Items]
Total notional value, net	4,210	12,100
Hong Kong Dollar [Member]
Derivative Financial Instruments Notional Amounts [Line Items]
Total notional value, net	4,200	1,844
South African Rand [Member]
Derivative Financial Instruments Notional Amounts [Line Items]
Total notional value, net	4,032	3,076
New Taiwan Dollar [Member]
Derivative Financial Instruments Notional Amounts [Line Items]
Total notional value, net	3,317	3,463
Indian Rupee [Member]
Derivative Financial Instruments Notional Amounts [Line Items]
Total notional value, net	2,991	2,150
Swedish Krona [Member]
Derivative Financial Instruments Notional Amounts [Line Items]
Total notional value, net	2,559	1,615
New Zealand Dollar [Member]
Derivative Financial Instruments Notional Amounts [Line Items]
Total notional value, net	928	943
Norwegian Krone [Member]
Derivative Financial Instruments Notional Amounts [Line Items]
Total notional value, net	$ 542