Hedging (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2016	Sep. 30, 2016	Dec. 31, 2015
Derivative [Line Items]
Amount of Ineffectiveness on Net Investment Hedges	$ 0	$ 0
Offsetting Derivative Assets [Abstract]
Gross Amounts Recognized	7,861	7,861	$ 5,766
Gross Amounts Offset	0	0	0
Gross Amounts Presented	7,861	7,861	5,766
Gross Amounts Not Offset	(1,774)	(1,774)	(901)
Legal Offset	6,087	6,087	4,865
Offsetting Derivative Liabilities [Abstract]
Gross Amounts Recognized	(1,774)	(1,774)	(901)
Gross Amounts Offset	0	0	0
Gross Amounts Presented	(1,774)	(1,774)	(901)
Gross Amounts Not Offset	1,774	1,774	901
Legal Offset	0	0	0
Prepaid and other current assets
Foreign Currency Cash Flow Hedge Derivative at Fair Value [Abstract]
Fair Value - assets	7,644	7,644	5,161
Other liabilities, current portion
Foreign Currency Cash Flow Hedge Derivative at Fair Value [Abstract]
Fair Value - liabilities	(1,459)	(1,459)	(769)
Other assets
Foreign Currency Cash Flow Hedge Derivative at Fair Value [Abstract]
Fair Value - assets	217	217	605
Other liabilities, excluding current portion
Foreign Currency Cash Flow Hedge Derivative at Fair Value [Abstract]
Fair Value - liabilities	(315)	(315)	(132)
Designated as hedging instrument \| Foreign Currency Forward Contract \| Cash Flow Hedging
Derivative [Line Items]
Notional amount of foreign currency forward contract	256,479	256,479	209,285
Designated as hedging instrument \| Euro \| Foreign Currency Forward Contract \| Cash Flow Hedging
Derivative [Line Items]
Notional amount of foreign currency forward contract	156,245	156,245	103,362
Designated as hedging instrument \| British pound sterling \| Foreign Currency Forward Contract \| Cash Flow Hedging
Derivative [Line Items]
Notional amount of foreign currency forward contract	73,684	73,684	78,756
Designated as hedging instrument \| Australian dollar \| Foreign Currency Forward Contract \| Cash Flow Hedging
Derivative [Line Items]
Notional amount of foreign currency forward contract	$ 26,550	$ 26,550	$ 27,167
Minimum \| Foreign Currency Forward Contract \| Cash Flow Hedging
Derivative [Line Items]
Derivative term		1 month
Maximum \| Foreign Currency Forward Contract \| Cash Flow Hedging
Derivative [Line Items]
Derivative term		18 months

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

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-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

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