Quarterly report [Sections 13 or 15(d)]

DEBT - SPV Facility (Details)

v3.25.3
DEBT - SPV Facility (Details)
 1 Months Ended 3 Months Ended 6 Months Ended 9 Months Ended
Apr. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
USD ($)
lender
Sep. 30, 2024
Jun. 30, 2025
Sep. 30, 2025
USD ($)
lender
Sep. 30, 2024
MSCC Funding I, LLC              
Line of Credit Facility [Line Items]              
Average interest rate (as a percent)     6.30% 7.90%   6.40% 7.90%
Revolving Credit Facility | Line of Credit              
Line of Credit Facility [Line Items]              
Commitment fee (as a percentage)           3.40%  
Revolving Credit Facility | SPV Facility | Line of Credit | MSCC Funding I, LLC              
Line of Credit Facility [Line Items]              
Debt instrument, basis spread on variable rate (as a percent)           1.95%  
Line of credit facility, unused capacity, commitment fee (as a percent) 0.40%       0.50%    
Line of credit facility, unused percentage of commitment amount (as a percent) 0.50       0.35    
Line of credit facility     $ 600,000,000.0     $ 600,000,000.0  
Debt instrument, number of lenders | lender     6     6  
Line of credit facility, maximum borrowing capacity including accordion feature     $ 800,000,000     $ 800,000,000  
Commitment fee (as a percentage)           50.00%  
Interest rate (as a percent)     6.20%     6.20%  
Revolving Credit Facility | SPV Facility | Line of Credit | MSCC Funding I, LLC | Minimum              
Line of Credit Facility [Line Items]              
Line of credit facility, unused capacity, commitment fee (as a percent)           0.40%  
Revolving Credit Facility | SPV Facility | Line of Credit | MSCC Funding I, LLC | Maximum              
Line of Credit Facility [Line Items]              
Line of credit facility, unused capacity, commitment fee (as a percent)           0.75%  
Revolving Credit Facility | SPV Facility | Line of Credit | MSCC Funding I, LLC | Margin Effective Period One              
Line of Credit Facility [Line Items]              
Debt instrument, basis spread on variable rate (as a percent) 1.95% 2.35%          
Revolving Credit Facility | SPV Facility | Line of Credit | MSCC Funding I, LLC | Margin Effective Period Two              
Line of Credit Facility [Line Items]              
Debt instrument, basis spread on variable rate (as a percent) 2.075% 2.475%       2.075%  
Revolving Credit Facility | SPV Facility | Line of Credit | MSCC Funding I, LLC | Margin Effective Period Three              
Line of Credit Facility [Line Items]              
Debt instrument, basis spread on variable rate (as a percent) 2.20% 2.60%       2.20%