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INVESTMENTS - Schedule of Fair Value of Equity Investments Trading (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022
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Debt and Equity Securities, FV-NI [Line Items] |  |
Equity investments trading | $ 551,394 | $ 625,058
Fixed income exchange traded funds |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Equity investments trading | 296,049 | 295,481
Financials |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Equity investments trading | 107,455 | 103,250
Equity exchange traded funds |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Equity investments trading | 0 | 90,510
Communications and technology |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Equity investments trading | 58,434 | 48,687
Consumer |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Equity investments trading | 36,532 | 33,447
Industrial, utilities and energy |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Equity investments trading | 25,012 | 25,326
Healthcare |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Equity investments trading | 24,001 | 24,617
Basic materials |  |
Debt and Equity Securities, FV-NI [Line Items] |  |
Equity investments trading | $ 3,911 | $ 3,740

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