v3.26.3
SECURITIES AND OTHER INVESTMENTS OWNED AND SECURITIES SOLD NOT YET PURCHASED - Schedule of securities and other investments (Details) - USD ($)
$ in Thousands
Sep. 30, 2026
Dec. 31, 2025
Securities and other investments owned at fair value:    
Securities and other investments owned [1] $ 307,830 $ 382,461
Equity securities valued under the measurement alternative 61,988 64,382
Total securities and other investments owned [1] 369,818 446,843
Securities sold not yet purchased, at fair value:    
Securities sold not yet purchased, at fair value 7,897 9,809
Corporate bonds    
Securities sold not yet purchased, at fair value:    
Securities sold not yet purchased, at fair value 241 467
Other fixed income securities    
Securities sold not yet purchased, at fair value:    
Securities sold not yet purchased, at fair value 827 0
Partnership interests and other investments at net asset value    
Securities and other investments owned at fair value:    
Securities and other investments owned 2,342 1,833
Equity Securities    
Securities sold not yet purchased, at fair value:    
Securities sold not yet purchased, at fair value 6,829 9,342
Fair Value, Inputs, Level 1, Level 2, and Level 3    
Securities and other investments owned at fair value:    
Securities and other investments owned 305,488 380,628
Fair Value, Inputs, Level 1, Level 2, and Level 3 | Partnership interests and other investments    
Securities and other investments owned at fair value:    
Securities and other investments owned 71,341 40,082
Fair Value, Inputs, Level 1, Level 2, and Level 3 | Corporate bonds    
Securities and other investments owned at fair value:    
Securities and other investments owned 11,909 31,751
Fair Value, Inputs, Level 1, Level 2, and Level 3 | Other fixed income securities    
Securities and other investments owned at fair value:    
Securities and other investments owned 4,845 4,373
Fair Value, Inputs, Level 1, Level 2, and Level 3 | Equity Securities    
Securities and other investments owned at fair value:    
Securities and other investments owned $ 217,393 $ 304,422
[1]
(1) At September 30, 2026 and December 31, 2025, the balance sheet includes cash of $1,046 and $446, securities and other investments owned, at fair value of $671 and $682, prepaid and other expenses of $3,064 and $3,737, accrued expenses and other liabilities of $28 and $28, and noncontrolling interest of $4,119 and $4,192, respectively, of consolidated variable interest entities (see Note 3 - Variable Interest Entities).