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Significant Agreements and Related Party Transactions - Additional Information (Details)
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
Component
Jun. 30, 2025
USD ($)
Dec. 31, 2024
Dec. 31, 2025
USD ($)
Related Party Transaction [Line Items]            
Annual management fee percentage     1.00%      
Management fee percentage per quarter 0.25%          
Management fee $ 8,182,000 $ 8,408,000 $ 16,445,000 $ 17,089,000    
Management fees payable 8,182,000   $ 8,182,000     $ 8,181,000
Number of components included in incentive fees | Component     2      
Hurdle rate for incentive fee purpose     1.75%      
Incentive fee if no excess income amount     $ 0      
Percentage of ordinary income considered for incentive If that exceeds hurdle amount     100.00%      
Percentage of Catch-up Amount Multiplied by NAV     2.12%   2.1875%  
Percentage ordinary income considered for incentive if that exceeds catchup amount     17.50%   20.00%  
Percentage of incentive fee     17.50%   20.00%  
Incentive fees 0 8,526,000 $ 12,438,000 15,330,000    
Incentive fees payable 0   0     3,844,000
Accrual or payment of incentive fees based on capital gain 0 0 0 0    
Incurred expenses for services provided by Administrator and Custodian fees 490,000 522,000 995,000 1,047,000    
Administration and custodian fees payable 839,000   839,000      
Incurred expenses for services provided by transfer agent 7,000 $ 7,000 13,000 $ 14,000    
Transfer agent fees payable 7,000   7,000      
Accrued expenses and other liabilities 7,002,000   7,002,000     8,649,000
Related Party | Asset Management Arrangement            
Related Party Transaction [Line Items]            
Accrued expenses and other liabilities $ 2,460,000   $ 2,460,000     $ 2,213,000
GS Group Inc            
Related Party Transaction [Line Items]            
Percentage of ownership of common stock by Affiliates 5.80%   5.80%     5.80%