For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=64851502&loc=d3e6351-108592

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
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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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Aggregate revenue during the period from services rendered in the normal course of business, after deducting allowances and discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1(d))
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Geographic Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
Geographic Information (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Geographic revenue based on customer location and long-lived tangible assets
Revenue	$ 124,419	$ 104,365	$ 241,071	$ 201,887
Long-lived tangible assets	41,347		41,347		$ 32,094
North America
Geographic revenue based on customer location and long-lived tangible assets
Revenue	49,565	$ 41,189	96,707	$ 78,695
Long-lived tangible assets	$ 40,373		$ 40,373		31,699
United States \| Total revenue \| Geographic concentration
Geographic revenue based on customer location and long-lived tangible assets
Concentration risk percentage	34.00%	34.00%	35.00%	34.00%
Europe
Geographic revenue based on customer location and long-lived tangible assets
Revenue	$ 41,094	$ 34,944	$ 80,280	$ 69,046
Long-lived tangible assets	$ 974		$ 974		$ 395
United Kingdom \| Total revenue \| Geographic concentration
Geographic revenue based on customer location and long-lived tangible assets
Concentration risk percentage	10.00%	11.00%	10.00%	11.00%
Rest of the world
Geographic revenue based on customer location and long-lived tangible assets
Revenue	$ 33,760	$ 28,232	$ 64,084	$ 54,146