Annual report pursuant to Section 13 and 15(d)

Investments - Schedule of Fair Value Portfolio of Investments by Asset Class (Details)

v3.25.0.1
Investments - Schedule of Fair Value Portfolio of Investments by Asset Class (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 3,659,978 $ 3,248,046
Investment Type Concentration Risk | Total Investments Benchmark    
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 3,659,978 $ 3,248,046
Percentage of Total Portfolio 100.00% 100.00%
Investment Type Concentration Risk | Total Investments Benchmark | Senior Secured Debt    
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 3,419,044 $ 2,987,577
Percentage of Total Portfolio 93.40% 92.00%
Investment Type Concentration Risk | Total Investments Benchmark | Unsecured Debt    
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 75,557 $ 69,722
Percentage of Total Portfolio 2.10% 2.20%
Investment Type Concentration Risk | Total Investments Benchmark | Preferred Stock    
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 53,802 $ 53,038
Percentage of Total Portfolio 1.50% 1.60%
Investment Type Concentration Risk | Total Investments Benchmark | Common Stock    
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 74,855 $ 99,132
Percentage of Total Portfolio 2.00% 3.10%
Investment Type Concentration Risk | Total Investments Benchmark | Warrants    
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 30,500 $ 33,969
Percentage of Total Portfolio 0.80% 1.00%
Investment Type Concentration Risk | Total Investments Benchmark | Investment Funds & Vehicles    
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 6,220 $ 4,608
Percentage of Total Portfolio 0.20% 0.10%