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SEGMENT AND GEOGRAPHIC INFORMATION (Total Revenue by Major Geographic Area) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenue, net | $ 383,315 | $ 365,854 | $ 366,190 | $ 357,082 | $ 368,602 | $ 278,834 | $ 282,164 | $ 258,636 | $ 1,472,441 | $ 1,188,236 | $ 992,075
Total long-lived assets | 320,029 |  |  |  | 285,329 |  |  |  | 320,029 | 285,329 |
United States (Includes long-lived assets in Puerto Rico) |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenue, net |  |  |  |  |  |  |  |  | 1,045,887 | 894,260 | 765,608
Total long-lived assets | 280,382 |  |  |  | 247,154 |  |  |  | 280,382 | 247,154 |
Europe |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenue, net |  |  |  |  |  |  |  |  | 201,354 | 150,147 | 120,588
Total long-lived assets | 32,679 |  |  |  | 30,942 |  |  |  | 32,679 | 30,942 |
Asia Pacific |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenue, net |  |  |  |  |  |  |  |  | 144,253 | 80,636 | 59,985
Total long-lived assets | 3,765 |  |  |  | 4,189 |  |  |  | 3,765 | 4,189 |
Rest of the World |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenue, net |  |  |  |  |  |  |  |  | 80,947 | 63,193 | $ 45,894
Total long-lived assets | $ 3,203 |  |  |  | $ 3,044 |  |  |  | $ 3,203 | $ 3,044 |

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