Hedging (Details) - USD ($) $ in Thousands	6 Months Ended
Jun. 30, 2016	Dec. 31, 2015
Offsetting Derivative Assets [Abstract]
Gross Amounts Recognized	$ 11,570	$ 5,766
Gross Amounts Offset	0	0
Gross Amounts Presented	11,570	5,766
Gross Amounts Not Offset	(7,405)	(901)
Legal Offset	4,165	4,865
Offsetting Derivative Liabilities [Abstract]
Gross Amounts Recognized	(7,405)	(901)
Gross Amounts Offset	0	0
Gross Amounts Presented	(7,405)	(901)
Gross Amounts Not Offset	7,405	901
Legal Offset	0	0
Prepaid and other current assets
Foreign Currency Cash Flow Hedge Derivative at Fair Value [Abstract]
Fair Value - assets	9,966	5,161
Other liabilities, current portion
Foreign Currency Cash Flow Hedge Derivative at Fair Value [Abstract]
Fair Value - liabilities	(7,317)	(769)
Other assets
Foreign Currency Cash Flow Hedge Derivative at Fair Value [Abstract]
Fair Value - assets	1,604	605
Other liabilities, excluding current portion
Foreign Currency Cash Flow Hedge Derivative at Fair Value [Abstract]
Fair Value - liabilities	(88)	(132)
Designated as hedging instrument \| Foreign Currency Forward Contract \| Cash Flow Hedging
Derivative [Line Items]
Notional amount of foreign currency forward contract	301,705	209,285
Designated as hedging instrument \| Euro \| Foreign Currency Forward Contract \| Cash Flow Hedging
Derivative [Line Items]
Notional amount of foreign currency forward contract	193,542	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	79,845	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	$ 28,318	$ 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.

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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+ References

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Period the derivative contract is outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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