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EQUITY SECURITIES - Narrative (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Schedule of Equity Method Investments [Line Items] |  |  |
Purchase of equity securities | $ 18,920 | $ 0 | $ 0
Equity securities, at fair value | 82,823 | 102,529 |
Equity securities, including securities measured at fair value of $82,823 and $102,529 | 296,317 | 342,682 |
Fair Value, Recurring |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Equity securities, at fair value | 82,800 |  |
Level 3 |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Equity securities, at fair value | $ 82,787 | $ 102,355 |
Level 3 | Assets | Investments, Fair Value Concentration Risk [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Concentration Risk, Percentage | 24.60% |  |
Level 3 | Fair Value, Recurring |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Equity securities, at fair value | $ 82,787 |  |
tZERO | Overstock.com, Inc. |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Purchase of equity securities | 15,000 |  |
SpeedRoute | Level 3 | Fair Value, Recurring | Market approach - recent transactions |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Equity securities, at fair value | 3,920 |  |
SpeedRoute | Overstock.com, Inc. |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Purchase of equity securities | $ 3,900 |  |

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