Quarterly report pursuant to Section 13 or 15(d)

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

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Investments - Schedule of Fair Value Portfolio of Investments by Asset Class (Details) - USD ($)
$ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2024
Dec. 31, 2023
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 3,568,539 $ 3,248,046
Investment Type Concentration Risk | Total Investments Benchmark    
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 3,568,539 $ 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 $ 3,320,419 $ 2,987,577
Percentage of Total Portfolio 93.00% 92.00%
Investment Type Concentration Risk | Total Investments Benchmark | Unsecured Debt    
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 72,090 $ 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 $ 46,525 $ 53,038
Percentage of Total Portfolio 1.30% 1.60%
Investment Type Concentration Risk | Total Investments Benchmark | Common Stock    
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 93,726 $ 99,132
Percentage of Total Portfolio 2.60% 3.10%
Investment Type Concentration Risk | Total Investments Benchmark | Warrants    
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 28,922 $ 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 $ 6,857 $ 4,608
Percentage of Total Portfolio 0.20% 0.10%