Hedging (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2017	Dec. 31, 2016
Derivative [Line Items]
Amount of Ineffectiveness on Net Investment Hedges	$ 0
Foreign Currency Forward Contract
Offsetting Derivative Assets [Abstract]
Gross Amounts Recognized	8,567	$ 15,593
Gross Amounts Offset	0	0
Gross Amounts Presented	8,567	15,593
Gross Amounts Not Offset	(699)	(144)
Legal Offset	7,868	15,449
Offsetting Derivative Liabilities [Abstract]
Gross Amounts Recognized	(699)	(144)
Gross Amounts Offset	0	0
Gross Amounts Presented	(699)	(144)
Gross Amounts Not Offset	699	144
Legal Offset	0	0
Prepaid and other current assets
Foreign Currency Cash Flow Hedge Derivative at Fair Value [Abstract]
Fair Value - assets	8,318	14,407
Other assets
Foreign Currency Cash Flow Hedge Derivative at Fair Value [Abstract]
Fair Value - assets	249	1,186
Other liabilities, current portion
Foreign Currency Cash Flow Hedge Derivative at Fair Value [Abstract]
Fair Value - liabilities	(613)	(144)
Other liabilities, excluding current portion
Foreign Currency Cash Flow Hedge Derivative at Fair Value [Abstract]
Fair Value - liabilities	(86)	0
Designated as hedging instrument \| Foreign Currency Forward Contract \| Cash Flow Hedging
Derivative [Line Items]
Notional amount of foreign currency forward contract	282,153	253,381
Designated as hedging instrument \| Euro \| Foreign Currency Forward Contract \| Cash Flow Hedging
Derivative [Line Items]
Notional amount of foreign currency forward contract	187,375	164,368
Designated as hedging instrument \| British pound sterling \| Foreign Currency Forward Contract \| Cash Flow Hedging
Derivative [Line Items]
Notional amount of foreign currency forward contract	66,133	65,237
Designated as hedging instrument \| Australian dollar \| Foreign Currency Forward Contract \| Cash Flow Hedging
Derivative [Line Items]
Notional amount of foreign currency forward contract	$ 28,645	$ 23,776
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.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

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