Hedging (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Foreign Currency Cash Flow Hedge Derivative at Fair Value [Abstract]
Fair Value - assets		$ 2,011
Fair Value - liabilities		0
Offsetting Derivative Assets [Abstract]
Gross Amounts Recognized	$ 4,159	2,011
Gross Amounts Offset	0	0
Gross Amount Presented	4,159	2,011
Gross Amount Not Offset	(1,576)	0
Legal Offset	2,583	2,011
Offsetting Derivative Liabilities [Abstract]
Gross Amounts Recognized	(1,576)
Gross Amounts Offset	0
Gross Amount Presented	(1,576)
Gross Amount Not Offset	1,576
Legal Offset	0
Prepaid and other current assets
Foreign Currency Cash Flow Hedge Derivative at Fair Value [Abstract]
Fair Value - assets	3,508	2,011
Other liabilities, current portion
Foreign Currency Cash Flow Hedge Derivative at Fair Value [Abstract]
Fair Value - liabilities	(1,552)	0
Other assets
Foreign Currency Cash Flow Hedge Derivative at Fair Value [Abstract]
Fair Value - assets	651
Other liabilities, excluding current portion
Foreign Currency Cash Flow Hedge Derivative at Fair Value [Abstract]
Fair Value - liabilities	(24)
Designated as hedging instrument | Foreign Currency Forward Contract | Cash Flow Hedging
Derivative [Line Items]
Notional amount of foreign currency forward contract	210,895	33,724
Designated as hedging instrument | Euro | Foreign Currency Forward Contract | Cash Flow Hedging
Derivative [Line Items]
Notional amount of foreign currency forward contract	106,620	20,209
Designated as hedging instrument | British pound sterling | Foreign Currency Forward Contract | Cash Flow Hedging
Derivative [Line Items]
Notional amount of foreign currency forward contract	78,861	13,515
Designated as hedging instrument | Australian dollar | Foreign Currency Forward Contract | Cash Flow Hedging
Derivative [Line Items]
Notional amount of foreign currency forward contract	$ 25,414	$ 0