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FAIR VALUE MEASUREMENTS - Additional information (Details) - USD ($) $ in Thousands | Jun. 30, 2026 | Dec. 31, 2025
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Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Fair value assets |  | $ 696,613 | $ 406,931
Securities and other investments owned | [1] | $ 660,185 | 382,461
New Notes payable | Weighted Average | Measurement Input, Cost Of Borrowing |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Estimated cost of borrowing |  | 0.150 |
Partnership interests and other investments at net asset value |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Securities and other investments owned |  | $ 2,374 | 1,833
Level 3 |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Fair value assets |  | $ 230,876 | $ 137,608
Percentage of total assets measured in Level 3 of the hierarchy level |  | 11.70% | 8.10%
[1] | (1) At June 30, 2026 and December 31, 2025 the balance sheet includes cash of $183 and $446, securities and other investments owned, at fair value of $713 and $682, prepaid and other expenses of $3,678 and $3,737, accrued expenses and other liabilities of $28 and $28, and noncontrolling interest of $3,939 and $4,192, respectively, of consolidated variable interest entities (see Note 3 - Variable Interest Entities).

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