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SEGMENT INFORMATION - Schedule of Gross Profit by Segment (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Segment Reporting Information [Line Items] |  |  |  |
Gross profit | $ 181,439 | $ 160,022 | $ 542,365 | $ 498,495
North America |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Gross profit | 126,810 | 109,717 | 399,380 | 355,180
International |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Gross profit | 54,629 | 50,305 | 142,985 | 143,315
Service | North America |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Gross profit | 126,810 | 98,821 | 399,212 | 307,581
Service | International |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Gross profit | 53,039 | 39,247 | 119,830 | 106,735
Local | North America |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Gross profit | 115,184 | 87,507 | 352,431 | 283,004
Local | International |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Gross profit | 43,876 | 33,687 | 103,495 | 93,054
Goods | North America |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Gross profit | 7,864 | 7,440 | 31,689 | 14,851
Goods | International |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Gross profit | 5,587 | 2,849 | 8,892 | 7,422
Travel | North America |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Gross profit | 3,762 | 3,874 | 15,092 | 9,726
Travel | International |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Gross profit | 3,576 | 2,711 | 7,443 | 6,259
Product | North America |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Gross profit | 0 | 10,896 | 168 | 47,599
Product | International |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Gross profit | $ 1,590 | $ 11,058 | $ 23,155 | $ 36,580

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