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SEGMENT INFORMATION - Schedule of Gross Profit by Segment (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Segment Reporting Information [Line Items] |  |  |
Gross Profit | $ 677,294 | $ 1,186,129 | $ 1,320,601
North America |  |  |
Segment Reporting Information [Line Items] |  |  |
Gross Profit | 475,631 | 807,745 | 890,684
International |  |  |
Segment Reporting Information [Line Items] |  |  |
Gross Profit | 201,663 | 378,384 | 429,917
Service | North America |  |  |
Segment Reporting Information [Line Items] |  |  |
Gross Profit | 420,799 | 702,403 | 744,599
Service | International |  |  |
Segment Reporting Information [Line Items] |  |  |
Gross Profit | 143,558 | 309,492 | 340,811
Service | Local | North America |  |  |
Segment Reporting Information [Line Items] |  |  |
Gross Profit | 379,040 | 643,499 | 671,352
Service | Local | International |  |  |
Segment Reporting Information [Line Items] |  |  |
Gross Profit | 125,912 | 269,666 | 289,427
Service | Goods | North America |  |  |
Segment Reporting Information [Line Items] |  |  |
Gross Profit | 28,852 | 13,165 | 15,302
Service | Goods | International |  |  |
Segment Reporting Information [Line Items] |  |  |
Gross Profit | 7,150 | 31,317 | 38,132
Service | Travel | North America |  |  |
Segment Reporting Information [Line Items] |  |  |
Gross Profit | 12,907 | 45,739 | 57,945
Service | Travel | International |  |  |
Segment Reporting Information [Line Items] |  |  |
Gross Profit | 10,496 | 8,509 | 13,252
Product | Goods | North America |  |  |
Segment Reporting Information [Line Items] |  |  |
Gross Profit | 54,832 | 105,342 | 146,085
Product | Goods | International |  |  |
Segment Reporting Information [Line Items] |  |  |
Gross Profit | $ 58,105 | $ 68,892 | $ 89,106

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