Quarterly report [Sections 13 or 15(d)]

EXTERNAL INVESTMENT MANAGER - Schedule of Statement of Operations (Details)

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EXTERNAL INVESTMENT MANAGER - Schedule of Statement of Operations (Details) - USD ($)
 3 Months Ended 12 Months Ended
Mar. 31, 2026
Dec. 31, 2025
Mar. 31, 2025
Dec. 31, 2025
Investment Company, Nonconsolidated Subsidiary [Line Items]        
Total expenses $ (52,263,000)   $ (47,236,000)  
NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS 48,981,000   116,082,000  
Increase (decrease) in incentive fee payable (600,000) $ 2,800,000    
Incentive fee payable, capital-gain-based 0      
External Investment Manager        
Investment Company, Nonconsolidated Subsidiary [Line Items]        
Total revenues before waivers 10,260,000   8,616,000  
Total revenues before waivers (985,000)   0  
Waiver of incentive fees 9,275,000   8,616,000  
Salaries, share-based compensation and other personnel costs (4,571,000)   (4,551,000)  
Other G&A expenses (895,000)   (785,000)  
Total allocated expenses (5,466,000)   (5,336,000)  
Other direct G&A expenses (10,000)   (38,000)  
Total expenses (5,476,000)   (5,374,000)  
Net income before taxes 3,799,000   3,242,000  
Tax expense (930,000)   (748,000)  
NET INCREASE IN NET ASSETS RESULTING FROM OPERATIONS 2,869,000   2,494,000  
External Investment Manager | Advisory Agreement, Active | Affiliated Entity        
Investment Company, Nonconsolidated Subsidiary [Line Items]        
Accrued incentive fees 2,100,000     $ 2,800,000
External Investment Manager | Management fee income        
Investment Company, Nonconsolidated Subsidiary [Line Items]        
Total revenues before waivers 6,071,000   5,752,000  
External Investment Manager | Incentive fees        
Investment Company, Nonconsolidated Subsidiary [Line Items]        
Total revenues before waivers 4,003,000   2,690,000  
External Investment Manager | Administrative services fees        
Investment Company, Nonconsolidated Subsidiary [Line Items]        
Total revenues before waivers $ 186,000   $ 174,000