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FAIR VALUE MEASUREMENTS - Schedule of Variable Interest Entities (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
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Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |
Other investments, maximum exposure to loss | $ 2,810,941 | $ 2,802,251
Carrying amount |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |
Other investments, maximum exposure to loss | 1,330,480 | 1,251,799
Unfunded Commitments |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |
Other investments, maximum exposure to loss | $ 1,480,461 | $ 1,550,452

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