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REVENUE FROM CONTRACTS WITH CUSTOMERS - Schedule of revenues from contracts with customers (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | $ 1,288,605 | $ 962,152 | $ 1,179,369
Interest income - Loans and securities lending | 284,896 | 245,400 | 122,723
Total revenues | 1,643,600 | 1,080,670 | 1,554,698
Capital Markets Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 226,976 | 223,818 | 539,398
Total revenues | 571,002 | 327,596 | 891,230
Wealth Management Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 187,276 | 224,104 | 358,487
Total revenues | 198,245 | 234,257 | 381,984
Auction and Liquidation segment: |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 103,265 | 69,509 | 73,517
Total revenues | 103,265 | 74,096 | 73,517
Financial Consulting Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 133,705 | 98,508 | 94,312
Total revenues | 133,705 | 98,508 | 94,312
Communications Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 337,689 | 235,655 | 93,347
Total revenues | 337,689 | 235,655 | 93,347
Consumer Products Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 233,202 | 77,821 |
Total revenues | 233,202 | 77,821 |
All Other: |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 66,492 | 32,737 | 20,308
Total revenues | 66,492 | 32,737 | 20,308
Corporate finance, consulting and investment banking fees |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 273,525 | 228,098 | 540,686
Corporate finance, consulting and investment banking fees | Capital Markets Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 190,480 | 169,955 | 484,247
Corporate finance, consulting and investment banking fees | Wealth Management Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Corporate finance, consulting and investment banking fees | Auction and Liquidation segment: |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Corporate finance, consulting and investment banking fees | Financial Consulting Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 83,045 | 58,143 | 56,439
Corporate finance, consulting and investment banking fees | Communications Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Corporate finance, consulting and investment banking fees | Consumer Products Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 |
Corporate finance, consulting and investment banking fees | All Other: |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Wealth and asset management fees |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 181,343 | 217,352 | 289,480
Wealth and asset management fees | Capital Markets Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 4,060 | 12,547 | 6,769
Wealth and asset management fees | Wealth Management Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 177,283 | 204,805 | 282,711
Wealth and asset management fees | Auction and Liquidation segment: |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Wealth and asset management fees | Financial Consulting Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Wealth and asset management fees | Communications Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Wealth and asset management fees | Consumer Products Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 |
Wealth and asset management fees | All Other: |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Commissions, fees and reimbursed expenses |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 122,151 | 113,561 | 181,110
Commissions, fees and reimbursed expenses | Capital Markets Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 32,436 | 41,316 | 48,382
Commissions, fees and reimbursed expenses | Wealth Management Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 9,993 | 19,299 | 75,776
Commissions, fees and reimbursed expenses | Auction and Liquidation segment: |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 29,062 | 12,581 | 19,079
Commissions, fees and reimbursed expenses | Financial Consulting Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 50,660 | 40,365 | 37,873
Commissions, fees and reimbursed expenses | Communications Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Commissions, fees and reimbursed expenses | Consumer Products Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 |
Commissions, fees and reimbursed expenses | All Other: |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Subscription services |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 324,758 | 219,379 | 79,149
Subscription services | Capital Markets Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Subscription services | Wealth Management Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Subscription services | Auction and Liquidation segment: |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Subscription services | Financial Consulting Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Subscription services | Communications Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 324,758 | 219,379 | 79,149
Subscription services | Consumer Products Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 |
Subscription services | All Other: |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Service contract revenues |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers |  |  | 1,090
Service contract revenues | Capital Markets Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers |  |  | 0
Service contract revenues | Wealth Management Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers |  |  | 0
Service contract revenues | Auction and Liquidation segment: |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers |  |  | 1,090
Service contract revenues | Financial Consulting Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers |  |  | 0
Service contract revenues | Communications Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers |  |  | 0
Service contract revenues | All Other: |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers |  |  | 0
Sale of goods |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 314,506 | 142,275 | 58,205
Sale of goods | Capital Markets Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Sale of goods | Wealth Management Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Sale of goods | Auction and Liquidation segment: |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 74,203 | 56,928 | 53,348
Sale of goods | Financial Consulting Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Sale of goods | Communications Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 6,737 | 7,526 | 4,857
Sale of goods | Consumer Products Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 233,202 | 77,821 |
Sale of goods | All Other: |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 364 | 0 | 0
Advertising, licensing and other |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 72,322 | 41,487 | 29,649
Advertising, licensing and other | Capital Markets Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Advertising, licensing and other | Wealth Management Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Advertising, licensing and other | Auction and Liquidation segment: |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Advertising, licensing and other | Financial Consulting Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 | 0
Advertising, licensing and other | Communications Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 6,194 | 8,750 | 9,341
Advertising, licensing and other | Consumer Products Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 0 | 0 |
Advertising, licensing and other | All Other: |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Total revenues from contracts with customers | 66,128 | 32,737 | 20,308
Interest income - Loans and securities lending |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Interest income - Loans and securities lending | 284,896 | 245,400 | 122,723
Interest income - Loans and securities lending | Capital Markets Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Interest income - Loans and securities lending | 284,896 | 240,813 | 122,723
Interest income - Loans and securities lending | Wealth Management Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Interest income - Loans and securities lending | 0 | 0 | 0
Interest income - Loans and securities lending | Auction and Liquidation segment: |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Interest income - Loans and securities lending | 0 | 4,587 | 0
Interest income - Loans and securities lending | Financial Consulting Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Interest income - Loans and securities lending | 0 | 0 | 0
Interest income - Loans and securities lending | Communications Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Interest income - Loans and securities lending | 0 | 0 | 0
Interest income - Loans and securities lending | Consumer Products Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Interest income - Loans and securities lending | 0 | 0 |
Interest income - Loans and securities lending | All Other: |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Interest income - Loans and securities lending | 0 | 0 | 0
Trading gains on investments |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Trading gains on investments | 21,603 | (148,294) | 210,910
Trading gains on investments | Capital Markets Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Trading gains on investments | 16,845 | (151,816) | 203,287
Trading gains on investments | Wealth Management Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Trading gains on investments | 4,758 | 3,522 | 7,623
Trading gains on investments | Auction and Liquidation segment: |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Trading gains on investments | 0 | 0 | 0
Trading gains on investments | Financial Consulting Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Trading gains on investments | 0 | 0 | 0
Trading gains on investments | Communications Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Trading gains on investments | 0 | 0 | 0
Trading gains on investments | Consumer Products Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Trading gains on investments | 0 | 0 |
Trading gains on investments | All Other: |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Trading gains on investments | 0 | 0 | 0
Fair value adjustment on loans |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Fair value adjustment on loans | 20,225 | (54,334) | 9,635
Fair value adjustment on loans | Capital Markets Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Fair value adjustment on loans | 20,225 | (54,334) | 9,635
Fair value adjustment on loans | Wealth Management Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Fair value adjustment on loans | 0 | 0 | 0
Fair value adjustment on loans | Auction and Liquidation segment: |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Fair value adjustment on loans | 0 | 0 | 0
Fair value adjustment on loans | Financial Consulting Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Fair value adjustment on loans | 0 | 0 | 0
Fair value adjustment on loans | Communications Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Fair value adjustment on loans | 0 | 0 | 0
Fair value adjustment on loans | Consumer Products Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Fair value adjustment on loans | 0 | 0 |
Fair value adjustment on loans | All Other: |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Fair value adjustment on loans | 0 | 0 | 0
Other |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Other | 28,271 | 75,746 | 32,061
Other | Capital Markets Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Other | 22,060 | 69,115 | 16,187
Other | Wealth Management Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Other | 6,211 | 6,631 | 15,874
Other | Auction and Liquidation segment: |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Other | 0 | 0 | 0
Other | Financial Consulting Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Other | 0 | 0 | 0
Other | Communications Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Other | 0 | 0 | 0
Other | Consumer Products Segment |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Other | 0 | 0 |
Other | All Other: |  |  |
Revenue from Contracts with Customers (Details) - Schedule of revenues from contracts with customers [Line Items] |  |  |
Other | $ 0 | $ 0 | $ 0

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