v3.26.1
Investments - Summary of Investments at Fair Value and Cost (Detail) - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Investments At Fair Value And Cost [Line Items]    
Cost $ 3,008,238 $ 1,567,756
Fair Value $ 3,008,628 $ 1,570,542
Percentage of Investments 100.00% 100.00%
First Lien Senior Secured [Member]    
Investments At Fair Value And Cost [Line Items]    
Cost $ 2,908,938 $ 1,532,317
Fair Value $ 2,903,414 $ 1,532,466
Percentage of Investments 96.50% 97.58%
Second Lien Senior Secured [Member]    
Investments At Fair Value And Cost [Line Items]    
Cost $ 5,440 $ 4,423
Fair Value $ 5,460 $ 4,467
Percentage of Investments 0.18% 0.28%
CLO [Member]    
Investments At Fair Value And Cost [Line Items]    
Cost [1]   $ 4,994
Fair Value [1]   $ 4,994
Percentage of Investments [1]   0.32%
Subordinated Notes [Member]    
Investments At Fair Value And Cost [Line Items]    
Cost [1] $ 48,779  
Fair Value [1] $ 49,318  
Percentage of Investments [1] 1.64%  
Preferred Equity [Member]    
Investments At Fair Value And Cost [Line Items]    
Cost $ 1,989  
Fair Value $ 499  
Percentage of Investments 0.02%  
Limited Partnership Interests [Member]    
Investments At Fair Value And Cost [Line Items]    
Cost $ 43,092  
Fair Value $ 49,937  
Percentage of Investments 1.66%  
Private Credit Funds [Member]    
Investments At Fair Value And Cost [Line Items]    
Cost   $ 26,022
Fair Value   $ 28,615
Percentage of Investments   1.82%
[1] CLOs are included as Subordinated Notes for the fiscal year ended 2025.