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COMMITMENTS, CONTINGENCIES AND REGULATORY MATTERS - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Jun. 30, 2025 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024
Concentration Risk |  |  |  |  |  |
Sublease income | $ 0.1 | $ 0.2 |  | $ 0.2 | $ 0.5 |
Amounts held in escrow and trust accounts | $ 52.5 |  |  | $ 52.5 |  | $ 27.1
Minimum |  |  |  |  |  |
Concentration Risk |  |  |  |  |  |
Lease term | 1 year |  |  | 1 year |  |
Maximum |  |  |  |  |  |
Concentration Risk |  |  |  |  |  |
Lease term | 6 years |  |  | 6 years |  |
Onity Financial Corporation | Revenue | Customer Concentration Risk |  |  |  |  |  |
Concentration Risk |  |  |  |  |  |
Revenue from largest customer (in percent) | 42.00% | 43.00% |  | 43.00% | 44.00% |
Highly Correlated - Onity | Revenue Benchmark | Customer Concentration Risk |  |  |  |  |  |
Concentration Risk |  |  |  |  |  |
Revenue from largest customer (in percent) | 4.00% |  |  | 5.00% |  |
Rithm | Revenue | Customer Concentration Risk | Onity Financial Corporation |  |  |  |  |  |
Concentration Risk |  |  |  |  |  |
Revenue from largest customer (in percent) |  |  | 11.00% |  |  |
Percentage of delinquent loans Onity services (in percent) |  |  | 0.59 |  |  |
Rithm | Revenue Benchmark | Customer Concentration Risk | Onity Financial Corporation |  |  |  |  |  |
Concentration Risk |  |  |  |  |  |
Revenue from largest customer (in percent) |  |  | 11.00% |  |  |

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