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Segment Information (Tables) | 12 Months Ended
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Dec. 31, 2017
Segment Reporting [Abstract] |
Revenues and Long-Lived Assets, by Geographic Region | The following table presents total revenues, gross profit, and long-lived assets, excluding long-term deferred tax assets, (in thousands) according to geographic region:
Geographic regions: |  | Domestic |  |  | EMEA |  |  | Other Regions |  |  | Consolidated |
Year ended December 31, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenues |  | $ | 292,930 |  |  | $ | 154,567 |  |  | $ | 57,046 |  |  | $ | 504,543 |
Gross profit |  | $ | 233,945 |  |  | $ | 126,147 |  |  | $ | 47,802 |  |  | $ | 407,894 |
Year ended December 31, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenues |  | $ | 310,972 |  |  | $ | 150,422 |  |  | $ | 50,767 |  |  | $ | 512,161 |
Gross profit |  | $ | 253,234 |  |  | $ | 122,865 |  |  | $ | 42,915 |  |  | $ | 419,014 |
Year ended December 31, 2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenues |  | $ | 326,792 |  |  | $ | 153,658 |  |  | $ | 49,419 |  |  | $ | 529,869 |
Gross profit |  | $ | 265,438 |  |  | $ | 121,148 |  |  | $ | 42,175 |  |  | $ | 428,761 |
As of December 31, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-lived assets |  | $ | 53,102 |  |  | $ | 4,108 |  |  | $ | 1,516 |  |  | $ | 58,726 |
As of December 31, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-lived assets |  | $ | 67,031 |  |  | $ | 3,256 |  |  | $ | 1,341 |  |  | $ | 71,628 |

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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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