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GOODWILL AND INTANGIBLE ASSETS - Narrative (Details) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Intangible Asset, Acquired, Finite-Lived [Line Items] |  |  |  |
Amortization expense | $ 52,300,000 | $ 28,900,000 | $ 142,300,000 | $ 87,100,000
Goodwill impairment | 0 | 0 | 0 | 0
Management contracts |  |  |  |
Intangible Asset, Acquired, Finite-Lived [Line Items] |  |  |  |
Fully amortized intangibles, amount removed during the period |  |  | 40,600,000 |
Management contracts | Credit Group |  |  |  |
Intangible Asset, Acquired, Finite-Lived [Line Items] |  |  |  |
Non-cash impairment charges | $ 2,300,000 |  | $ 2,300,000 |
Management contracts | Credit Group, Real Assets Group and Secondaries Group |  |  |  |
Intangible Asset, Acquired, Finite-Lived [Line Items] |  |  |  |
Non-cash impairment charges |  | $ 8,900,000 |  | $ 8,900,000

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