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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