v3.26.3
SECURITIES AND OTHER INVESTMENTS OWNED AND SECURITIES SOLD NOT YET PURCHASED - Schedule of equity method investments (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Schedule of Equity Method Investments [Line Items]          
Equity (Deficit) attributable to investee $ (97,718)   $ (97,718)   $ (171,533)
Revenues 33,028 $ 277,871 624,205 $ 689,236  
Net income (loss) attributable to investees (241,003) 91,083 (7,181) 220,579  
B&W          
Schedule of Equity Method Investments [Line Items]          
Current assets 725,441 479,733 725,441 479,733  
Noncurrent assets 274,162 178,151 274,162 178,151  
Current liabilities 500,297 400,985 500,297 400,985  
Noncurrent liabilities 441,937 489,106 441,937 489,106  
Revenues 319,716 144,054 647,547 391,524  
Cost of revenues 273,080 100,812 534,048 283,988  
(Loss) income from continuing operations 14,255 (6,052) (82,058) (85,133)  
Net income (loss) attributable to investees 14,255 (58,492) (53,460) (143,502)  
B&W | Investee          
Schedule of Equity Method Investments [Line Items]          
Equity (Deficit) attributable to investee 57,369 (232,207) 57,369 (232,207)  
Net income (loss) attributable to investees 14,255 (58,492) (53,460) (143,564)  
Other Equity Investments          
Schedule of Equity Method Investments [Line Items]          
Current assets 48,669 23,491 48,669 23,491  
Noncurrent assets 161,936 140,981 161,936 140,981  
Current liabilities 13,145 22,988 13,145 22,988  
Noncurrent liabilities 98,374 66,509 98,374 66,509  
Revenues 19,332 16,709 54,980 46,932  
Cost of revenues 4,657 2,928 10,660 7,725  
Other Equity Investments | Investee          
Schedule of Equity Method Investments [Line Items]          
Equity (Deficit) attributable to investee 99,086 74,975 99,086 74,975  
Net income (loss) attributable to investees $ 5,496 $ 872 $ 9,167 $ 4,881