v3.25.4
Investments - Schedule of Investments Excluding Investments in Money Market Funds (Details) - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Schedule of Investments [Line Items]    
Cost $ 15,704,123 [1] $ 7,285,922
Fair Value 15,674,510 [1] 7,273,815
1st Lien/Senior Secured Debt    
Schedule of Investments [Line Items]    
Cost 15,059,143 7,014,260
Fair Value 15,033,160 7,006,800
1st Lien/Last-Out Unitranche    
Schedule of Investments [Line Items]    
Cost 295,586 263,347
Fair Value 297,348 261,643
2nd Lien/Senior Secured Debt    
Schedule of Investments [Line Items]    
Cost 109,673  
Fair Value 110,097  
Structured Finance Obligation - Debt Instruments    
Schedule of Investments [Line Items]    
Cost 171,830  
Fair Value 172,100  
Structured Finance Obligation - Equity Instruments    
Schedule of Investments [Line Items]    
Cost 55,039  
Fair Value 54,401  
Preferred Stock    
Schedule of Investments [Line Items]    
Cost 5,168 3,101
Fair Value 2,093  
Common Stock    
Schedule of Investments [Line Items]    
Cost 7,660 5,214
Fair Value 5,282 $ 5,372
Warrants    
Schedule of Investments [Line Items]    
Cost 24  
Fair Value $ 29  
[1] For Industry subtotal and percentage, see Note 4 “Investments.”