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SEGMENT INFORMATION - Schedule of Segment's Contribution with Respect to Net Revenue, Operating Expenses, Operating Income (Loss) and Total Assets (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Dec. 31, 2023
Segment Reporting Information [Line Items] |  |  |  |  |
Net Revenue | $ 784,866 | $ 523,918 | $ 2,234,968 | $ 1,709,468 |
Operating Expenses | 623,679 | 528,775 | 1,955,580 | 1,861,322 |
Operating Income (Loss) | 161,187 | (4,857) | 279,388 | (151,854) |
Total Assets | 4,820,004 |  | 4,820,004 |  | $ 4,635,781
Operating Segments | Financial Advisory |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Net Revenue | 370,917 | 266,048 | 1,235,732 | 896,099 |
Operating Expenses | 333,961 | 295,609 | 1,132,793 | 1,063,789 |
Operating Income (Loss) | 36,956 | (29,561) | 102,939 | (167,690) |
Total Assets | 1,169,828 |  | 1,169,828 |  | 1,154,483
Operating Segments | Asset Management |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Net Revenue | 293,878 | 284,855 | 874,841 | 857,212 |
Operating Expenses | 251,981 | 232,011 | 749,066 | 749,281 |
Operating Income (Loss) | 41,897 | 52,844 | 125,775 | 107,931 |
Total Assets | 1,117,161 |  | 1,117,161 |  | 1,232,364
Corporate |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Net Revenue | 120,071 | (26,985) | 124,395 | (43,843) |
Operating Expenses | 37,737 | 1,155 | 73,721 | 48,252 |
Operating Income (Loss) | 82,334 | $ (28,140) | 50,674 | $ (92,095) |
Total Assets | $ 2,533,015 |  | $ 2,533,015 |  | $ 2,248,934

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