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DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Sep. 30, 2024 USD ($) | Sep. 30, 2023 USD ($) | Sep. 30, 2024 USD ($) segment payment_processor | Sep. 30, 2023 USD ($) | Dec. 31, 2023 USD ($) payment_processor | Jan. 01, 2023 USD ($)
Concentration Risk [Line Items] |  |  |  |  |  |
Number of reportable segments | segment |  |  | 2 |  |  |
Increase in retained earnings | $ 422,598 |  | $ 422,598 |  | $ (528,429) |
Advertising costs | 81,900 | $ 78,100 | 221,800 | $ 283,300 |  |
Selling and marketing expenses not directly related to a revenue generating transaction | $ 234,400 | $ 214,200 | $ 697,900 | $ 693,300 |  |
Adjustments |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |
Increase in retained earnings |  |  |  |  |  | $ 30,500
Minimum |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |
Settlements receivable period |  |  | 1 day |  |  |
Maximum |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |
Settlements receivable period |  |  | 2 days |  |  |
Settlements Receivable | Credit Concentration Risk |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |
Number of third party processors | payment_processor |  |  | 4 |  | 2 |
Settlements Receivable | Credit Concentration Risk | Third Party Processor One |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |
Concentration risk |  |  | 31.00% |  | 46.00% |
Settlements Receivable | Credit Concentration Risk | Third Party Processor Two |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |
Concentration risk |  |  | 29.00% |  | 35.00% |
Settlements Receivable | Credit Concentration Risk | Third Party Processor Three |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |
Concentration risk |  |  | 12.00% |  |  |
Settlements Receivable | Credit Concentration Risk | Third Party Processor Four |  |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |  |
Concentration risk |  |  | 10.00% |  |  |

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