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REVENUE FROM CONTRACTS WITH CUSTOMERS - Schedule of revenues from contracts with customers (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | $ 188,166 | $ 256,039 | $ 385,393 | $ 519,446
Total revenues | 225,302 | 94,885 | 411,365 | 392,475
Capital Markets | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 37,888 | 48,478 | 59,844 | 105,955
Total revenues | 68,352 | (114,646) | 72,714 | (24,823)
Wealth Management | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 31,949 | 48,903 | 72,797 | 98,848
Total revenues | 38,621 | 50,873 | 85,899 | 102,655
Communications | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 62,203 | 79,209 | 126,677 | 161,575
Total revenues | 62,203 | 79,209 | 126,677 | 161,575
Communications | All Other |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues | 12,279 | 23,029 | 31,998 | 45,126
Consumer Products | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 43,284 | 51,424 | 85,387 | 102,946
Total revenues | 43,284 | 51,424 | 85,387 | 102,946
E-Commerce | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers |  | 4,996 | 6,997 | 4,996
Total revenues | 0 | 4,996 | 6,997 | 4,996
All Other | All Other |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 12,842 | 23,029 | 33,691 | 45,126
Total revenues | 12,842 | 23,029 | 33,691 | 45,126
Corporate finance, consulting and investment banking fees |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 32,346 | 40,082 | 50,075 | 90,245
Corporate finance, consulting and investment banking fees | Capital Markets | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 32,346 | 40,082 | 50,075 | 90,245
Corporate finance, consulting and investment banking fees | Wealth Management | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Corporate finance, consulting and investment banking fees | Communications | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Corporate finance, consulting and investment banking fees | Consumer Products | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Corporate finance, consulting and investment banking fees | E-Commerce | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers |  | 0 | 0 | 0
Corporate finance, consulting and investment banking fees | All Other | All Other |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Wealth and asset management fees |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 30,332 | 47,540 | 68,433 | 94,655
Wealth and asset management fees | Capital Markets | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 959 | 1,368 | 1,831 | 2,425
Wealth and asset management fees | Wealth Management | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 29,373 | 46,172 | 66,602 | 92,230
Wealth and asset management fees | Communications | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Wealth and asset management fees | Consumer Products | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Wealth and asset management fees | E-Commerce | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers |  | 0 | 0 | 0
Wealth and asset management fees | All Other | All Other |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Commissions, fees and reimbursed expenses |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 7,159 | 9,759 | 14,133 | 19,903
Commissions, fees and reimbursed expenses | Capital Markets | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 4,583 | 7,028 | 7,938 | 13,285
Commissions, fees and reimbursed expenses | Wealth Management | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 2,576 | 2,731 | 6,195 | 6,618
Commissions, fees and reimbursed expenses | Communications | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Commissions, fees and reimbursed expenses | Consumer Products | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Commissions, fees and reimbursed expenses | E-Commerce | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers |  | 0 | 0 | 0
Commissions, fees and reimbursed expenses | All Other | All Other |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Subscription services |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 59,689 | 76,389 | 121,806 | 156,126
Subscription services | Capital Markets | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Subscription services | Wealth Management | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Subscription services | Communications | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 59,689 | 76,389 | 121,806 | 156,126
Subscription services | Consumer Products | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Subscription services | E-Commerce | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers |  | 0 | 0 | 0
Subscription services | All Other | All Other |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Sale of goods |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 45,073 | 55,573 | 92,528 | 109,006
Total revenues | 45,073 | 55,573 | 92,528 | 109,006
Sale of goods | Capital Markets | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Sale of goods | Wealth Management | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Sale of goods | Communications | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 1,471 | 1,465 | 2,772 | 2,761
Sale of goods | Consumer Products | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 43,284 | 51,424 | 85,387 | 102,946
Sale of goods | E-Commerce | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers |  | 2,265 | 3,528 | 2,265
Sale of goods | All Other | All Other |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 318 | 419 | 841 | 1,034
Advertising and other |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 13,567 | 26,696 | 38,418 | 49,511
Advertising and other | Capital Markets | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Advertising and other | Wealth Management | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Advertising and other | Communications | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 1,043 | 1,355 | 2,099 | 2,688
Advertising and other | Consumer Products | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Advertising and other | E-Commerce | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers |  | 2,731 | 3,469 | 2,731
Advertising and other | All Other | All Other |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 12,524 | 22,610 | 32,850 | 44,092
Trading gains (losses), net |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | 27,680 | (31,321) | 11,509 | (48,988)
Trading gains (losses), net | Capital Markets | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | 22,480 | (32,612) | 5,697 | (50,879)
Trading gains (losses), net | Wealth Management | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | 5,200 | 1,291 | 5,812 | 1,891
Trading gains (losses), net | Communications | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | 0 | 0 | 0 | 0
Trading gains (losses), net | Consumer Products | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | 0 | 0 | 0 | 0
Trading gains (losses), net | E-Commerce | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer |  | 0 | 0 | 0
Trading gains (losses), net | All Other | All Other |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | 0 | 0 | 0 | 0
Fair value adjustments on loans |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | 800 | (175,582) | (7,296) | (187,783)
Total revenues | 800 | (175,582) | (7,296) | (187,783)
Fair value adjustments on loans | Capital Markets | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | 800 | (175,582) | (7,296) | (187,783)
Total revenues | 800 | (175,582) | (7,296) | (187,783)
Fair value adjustments on loans | Wealth Management | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | 0 | 0 | 0 | 0
Fair value adjustments on loans | Communications | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | 0 | 0 | 0 | 0
Fair value adjustments on loans | Consumer Products | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | 0 | 0 | 0 | 0
Fair value adjustments on loans | E-Commerce | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer |  | 0 | 0 | 0
Fair value adjustments on loans | All Other | All Other |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | 0 | 0 | 0 | 0
Interest income - loans |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | 3,853 | 18,508 | 7,049 | 40,643
Total revenues | 3,853 | 18,508 | 7,049 | 40,643
Interest income - loans | Capital Markets | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | 3,853 | 18,508 | 7,049 | 40,643
Total revenues | 3,853 | 18,508 | 7,049 | 40,643
Interest income - loans | Wealth Management | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | 0 | 0 | 0 | 0
Interest income - loans | Communications | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | 0 | 0 | 0 | 0
Interest income - loans | Consumer Products | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | 0 | 0 | 0 | 0
Interest income - loans | E-Commerce | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer |  | 0 | 0 | 0
Interest income - loans | All Other | All Other |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | 0 | 0 | 0 | 0
Interest income - securities lending |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | 2,124 | 24,798 | 2,964 | 62,607
Total revenues | 2,124 | 24,798 | 2,964 | 62,607
Interest income - securities lending | Capital Markets | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | 2,124 | 24,798 | 2,964 | 62,607
Total revenues | 2,124 | 24,798 | 2,964 | 62,607
Interest income - securities lending | Wealth Management | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | 0 | 0 | 0 | 0
Interest income - securities lending | Communications | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | 0 | 0 | 0 | 0
Interest income - securities lending | Consumer Products | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | 0 | 0 | 0 | 0
Interest income - securities lending | E-Commerce | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer |  | 0 | 0 | 0
Interest income - securities lending | All Other | All Other |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | 0 | 0 | 0 | 0
Other |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | 2,679 | 2,443 | 11,746 | 6,550
Other | Capital Markets | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | 1,207 | 1,764 | 4,456 | 4,634
Other | Wealth Management | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | 1,472 | 679 | 7,290 | 1,916
Other | Communications | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | 0 | 0 | 0 | 0
Other | Consumer Products | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | 0 | 0 | 0 | 0
Other | E-Commerce | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer |  | 0 | 0 | 0
Other | All Other | All Other |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | $ 0 | $ 0 | $ 0 | $ 0

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