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FAIR VALUE MEASUREMENT - Changes in Fair Value (Details) - Fair Value, Recurring - Level 3 - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Beginning balance | $ 40,215 | $ 22,637 | $ 21,008 | $ 46,104
New acquisitions and measurement adjustments | 4,457 | 3,123 | 26,164 | 13,572
Payouts | (4,325) | (3,128) | (7,773) | (37,614)
Interest and fair value adjustments | 739 | 13 | 1,936 | 556
Charge offset, forfeit and other | 1,004 | (507) | 755 | (480)
Ending balance | $ 42,090 | $ 22,138 | $ 42,090 | $ 22,138

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