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REVENUE FROM CONTRACTS WITH CUSTOMERS - Schedule of revenues from contracts with customers (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | $ 249,447 | $ 298,221 | $ 814,332 | $ 825,559
Total revenues | 199,305 | 363,268 | 637,222 | 1,151,943
Capital Markets Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 28,136 | 76,882 | 134,089 | 165,844
Total revenues | (24,690) | 139,566 | (49,513) | 487,029
Wealth Management Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 47,375 | 49,002 | 146,222 | 143,696
Total revenues | 50,059 | 51,365 | 152,714 | 148,895
Financial Consulting Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 23,941 | 20,225 | 69,383 | 52,325
Total revenues | 23,941 | 20,225 | 69,383 | 52,325
Communications Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 67,559 | 83,793 | 229,134 | 255,668
Total revenues | 67,559 | 83,793 | 229,134 | 255,668
Communications Segment | All Other |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues | 32,643 | 9,928 | 82,765 | 28,870
Consumer Products Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 49,793 | 58,391 | 152,739 | 179,156
Total revenues | 49,793 | 58,391 | 152,739 | 179,156
All Other | All Other |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 32,643 | 9,928 | 82,765 | 28,870
Total revenues | 32,643 | 9,928 | 82,765 | 28,870
Corporate finance, consulting and investment banking fees |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 45,257 | 87,654 | 180,943 | 189,630
Corporate finance, consulting and investment banking fees | Capital Markets Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 21,316 | 67,429 | 111,560 | 137,305
Corporate finance, consulting and investment banking fees | Wealth Management Segment | 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 | Financial Consulting Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 23,941 | 20,225 | 69,383 | 52,325
Corporate finance, consulting and investment banking fees | Communications Segment | 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 Segment | 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 | 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 | 47,009 | 49,291 | 141,663 | 138,972
Wealth and asset management fees | Capital Markets Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 1,252 | 1,958 | 3,677 | 3,880
Wealth and asset management fees | Wealth Management Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 45,757 | 47,333 | 137,986 | 135,092
Wealth and asset management fees | Financial Consulting Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Wealth and asset management fees | Communications Segment | 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 Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 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 | 7,186 | 9,164 | 27,088 | 33,263
Commissions, fees and reimbursed expenses | Capital Markets Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 5,568 | 7,495 | 18,852 | 24,659
Commissions, fees and reimbursed expenses | Wealth Management Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 1,618 | 1,669 | 8,236 | 8,604
Commissions, fees and reimbursed expenses | Financial Consulting Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Commissions, fees and reimbursed expenses | Communications Segment | 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 Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 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 | 65,041 | 80,713 | 221,168 | 245,903
Subscription services | Capital Markets Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Subscription services | Wealth Management Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Subscription services | Financial Consulting Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Subscription services | Communications Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 65,041 | 80,713 | 221,168 | 245,903
Subscription services | Consumer Products Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 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
Service contract revenues |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers |  |  | 0 |
Service contract revenues | Capital Markets Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers |  |  | 0 |
Service contract revenues | Wealth Management Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers |  |  | 0 |
Service contract revenues | Financial Consulting Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers |  |  | 0 |
Service contract revenues | Communications Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers |  |  | 0 |
Service contract revenues | Consumer Products Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers |  |  | 0 |
Service contract revenues | All Other | All Other |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers |  |  | 0 |
Sale of goods |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 55,248 | 60,029 | 164,254 | 184,301
Total revenues | 55,248 | 60,029 | 164,254 | 184,301
Sale of goods | Capital Markets Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Sale of goods | Wealth Management Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Sale of goods | Financial Consulting Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Sale of goods | Communications Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 1,318 | 1,638 | 4,079 | 5,145
Sale of goods | Consumer Products Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 49,793 | 58,391 | 152,739 | 179,156
Sale of goods | All Other | All Other |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 4,137 | 0 | 7,436 | 0
Advertising and other |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 29,706 | 11,370 | 79,216 | 33,490
Advertising and other | Capital Markets Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Advertising and other | Wealth Management Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Advertising and other | Financial Consulting Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Advertising and other | Communications Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 1,200 | 1,442 | 3,887 | 4,620
Advertising and other | Consumer Products Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 0 | 0 | 0 | 0
Advertising and other | All Other | All Other |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues from contracts with customers | 28,506 | 9,928 | 75,329 | 28,870
Trading (loss) income |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | (1,238) | (9,727) | (50,226) | 31,723
Trading (loss) income | Capital Markets Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | (1,908) | (10,217) | (52,787) | 29,488
Trading (loss) income | Wealth Management Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | 670 | 490 | 2,561 | 2,235
Trading (loss) income | Financial Consulting Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | 0 | 0 | 0 | 0
Trading (loss) income | Communications Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | 0 | 0 | 0 | 0
Trading (loss) income | Consumer Products Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | 0 | 0 | 0 | 0
Trading (loss) income | 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 | (71,477) | (860) | (259,260) | 51,623
Total revenues | (71,477) | (860) | (259,260) | 51,623
Fair value adjustments on loans | Capital Markets Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | (71,477) | (860) | (259,260) | 51,623
Total revenues | (71,477) | (860) | (259,260) | 51,623
Fair value adjustments on loans | Wealth Management Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | 0 | 0 | 0 | 0
Fair value adjustments on loans | Financial Consulting Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | 0 | 0 | 0 | 0
Fair value adjustments on loans | Communications Segment | 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 Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | 0 | 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 | 11,251 | 27,397 | 51,894 | 102,535
Total revenues | 11,251 | 27,397 | 51,894 | 102,535
Interest income - loans | Capital Markets Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | 11,251 | 27,397 | 51,894 | 102,535
Total revenues | 11,251 | 27,397 | 51,894 | 102,535
Interest income - loans | Wealth Management Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | 0 | 0 | 0 | 0
Interest income - loans | Financial Consulting Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | 0 | 0 | 0 | 0
Interest income - loans | Communications Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | 0 | 0 | 0 | 0
Interest income - loans | Consumer Products Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | 0 | 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 | 7,007 | 42,333 | 69,614 | 119,580
Total revenues | 7,007 | 42,333 | 69,614 | 119,580
Interest income - securities lending | Capital Markets Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | 7,007 | 42,333 | 69,614 | 119,580
Total revenues | 7,007 | 42,333 | 69,614 | 119,580
Interest income - securities lending | Wealth Management Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | 0 | 0 | 0 | 0
Interest income - securities lending | Financial Consulting Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | 0 | 0 | 0 | 0
Interest income - securities lending | Communications Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | 0 | 0 | 0 | 0
Interest income - securities lending | Consumer Products Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | 0 | 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 | 4,315 | 5,904 | 10,868 | 20,923
Other | Capital Markets Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | 2,301 | 4,031 | 6,937 | 17,959
Other | Wealth Management Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | 2,014 | 1,873 | 3,931 | 2,964
Other | Financial Consulting Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | 0 |  | 0 | 0
Other | Communications Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | 0 | 0 | 0 | 0
Other | Consumer Products Segment | Operating Segments |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenue not from contract with customer | 0 | 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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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. 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