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Segment and Geographic Information - Summary (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2018 USD ($) Segment	Jun. 30, 2017 USD ($)
Segment Reporting [Abstract]
Number of reportable segments | Segment			1
Segment Reporting Information [Line Items]
Revenues	$ 349,747	$ 290,917	$ 676,535	$ 562,858
United States
Segment Reporting Information [Line Items]
Revenues	179,843	173,613	351,787	343,929
International
Segment Reporting Information [Line Items]
Revenues	169,904	117,304	324,748	218,929
Europe
Segment Reporting Information [Line Items]
Revenues	144,462	94,754	275,076	172,692
Other geographies
Segment Reporting Information [Line Items]
Revenues	$ 25,442	$ 22,550	$ 49,672	$ 46,237

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- Definition

Revenues, Adjusted by Net Allowances

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- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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- Details

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- Details

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- Details

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