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Segment Information (Tables) | 12 Months Ended
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Dec. 31, 2017
Segment Reporting [Abstract] |
Schedule of Geographical Areas of Which Company Operates | The following tables present information about geographic areas in which the Company operates (in thousands):
| Year Ended December 31,
| 2017 |  | 2016 |  | 2015
Revenues(1): |  |  |  |  |
United States | $ | 665,564 |  |  | $ | 669,636 |  |  | $ | 709,405 |
International |  |  |  |  |
Europe(2) | 427,655 |  |  | 270,411 |  |  | 376,055 |
Other geographies | 93,819 |  |  | 89,211 |  |  | 44,507 |
Total | $ | 1,187,038 |  |  | $ | 1,029,258 |  |  | $ | 1,129,967 |
________________________
(1) | Revenues are attributed to countries based on location of customer.
(2) | Based on the financial information that is used to produce the general-purpose financial statements, providing further geographic information is impracticable.
Schedule of Long-lived Assets by Geographic Areas |
| December 31, 2017 |  | December 31, 2016
Long-lived assets(1): |  |  |
United States | $ | 40,550 |  |  | $ | 39,126 |
International |  |  |
United Kingdom | 25,287 |  |  | 20,860 |
Other foreign countries | 10,439 |  |  | 12,271 |
| 35,726 |  |  | 33,131 |
Total | $ | 76,276 |  |  | $ | 72,257 |
________________________
(1) | Long-lived assets consists of property and equipment, net.

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- Definition Tabular disclosure of long-lived assets, excluding financial instruments, long-term customer relationships of a financial institution, mortgage rights, deferred policy acquisition costs, and deferred tax assets, by geographic areas located in the entity's country of domicile and foreign countries in which the entity holds 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 -Subparagraph b -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e9038-108599 + Details
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- Definition Tabular disclosure of information concerning material long-lived assets (excluding financial instruments, customer relationships with financial institutions, mortgage and other servicing rights, deferred policy acquisition costs, and deferred taxes assets) located in identified geographic areas and/or the amount of revenue from external customers attributed to that country from which revenue is material. An entity may also provide subtotals of geographic information about groups of countries. + 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) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e9038-108599 + Details
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