v3.26.1
Financial Instruments and Other Inventory Positions - Schedule of Financial Instruments and Other Inventory Positions by Type (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Financial instruments and other inventory positions owned    
Convertible securities $ 147,513 $ 140,306
Fixed income securities 9,677 2,831
Taxable securities 26,132 33,021
Tax-exempt securities 126,827 125,419
Short-term securities 39,095 19,531
Asset-backed securities 133,356 92,472
U.S. government agency securities 63,341 82,666
U.S. government securities 6,763 201
Derivative contracts 5,380 5,823
Total financial instruments and other inventory positions owned 558,084 502,270
Financial instruments and other inventory positions sold, but not yet purchased    
Equity securities 56,262 0
Fixed income securities 2,481 3,300
U.S. government securities 20,177 43,403
Derivative contracts 1,625 1,811
Total financial instruments and other inventory positions sold, but not yet purchased 80,545 48,514
Asset Pledged as Collateral    
Financial instruments and other inventory positions owned    
Total financial instruments and other inventory positions owned 95,240 67,066
Asset Pledged as Collateral | Short-term Debt    
Financial instruments and other inventory positions owned    
Total financial instruments and other inventory positions owned $ 95,200 $ 67,100