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FAIR VALUE MEASUREMENTS - Schedule of Variable Interest Entities (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
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Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |
Other investments, maximum exposure to loss | $ 4,349,325 | $ 3,856,504
Carrying Amount |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |
Other investments, maximum exposure to loss | 2,276,101 | 1,993,362
Unfunded Commitments |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |
Other investments, maximum exposure to loss | $ 2,073,224 | $ 1,863,142

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