SECURITIES AND OTHER INVESTMENTS OWNED AND SECURITIES SOLD NOT YET PURCHASED - Schedule of equity securities without readily determinable fair value (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Securities And Other Investments Owned And Securities Sold Not Yet Purchased [Abstract] | ||
| Upward carrying value changes | $ 2,515 | $ 1,848 |
| Downward carrying value changes/impairment | $ (6,803) | $ (2) |