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EQUITY SECURITIES PORTFOLIO INVESTMENT - Narrative (Details)
$ in Thousands, £ in Millions
3 Months Ended
Apr. 03, 2020
USD ($)
Apr. 03, 2020
GBP (£)
Mar. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Jan. 19, 2024
USD ($)
Nov. 01, 2023
USD ($)
Dec. 03, 2020
Offsetting Liabilities [Line Items]              
Fair value of investment     $ 18,064 $ 23,135      
Life Sciences Portfolio              
Offsetting Liabilities [Line Items]              
Investment at fair value     25,700 $ 25,700      
Arix              
Offsetting Liabilities [Line Items]              
Fair value of investment     0   $ 57,100 $ 57,100  
MalinJ1              
Offsetting Liabilities [Line Items]              
Ownership percentage             63.90%
Earnings on equity investment in joint venture     $ 0        
MalinJ1 | MalinJ1              
Offsetting Liabilities [Line Items]              
Equity method investment ownership     41.00%        
Option Agreement | Portfolio Companies              
Offsetting Liabilities [Line Items]              
Payments to acquire investments $ 277,500 £ 223.9