Quarterly report pursuant to Section 13 or 15(d)

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

v3.23.3
Investments - Schedule of Fair Value Portfolio of Investments by Asset Class (Details) - USD ($)
$ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2023
Dec. 31, 2022
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 3,261,391 $ 2,963,955
Investment Type Concentration Risk | Total Investments Benchmark    
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 3,261,391 $ 2,963,955
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 $ 3,021,950 $ 2,741,388
Percentage of Total Portfolio 92.70% 92.50%
Investment Type Concentration Risk | Total Investments Benchmark | Unsecured Debt    
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 69,930 $ 54,056
Percentage of Total Portfolio 2.10% 1.80%
Investment Type Concentration Risk | Total Investments Benchmark | Equity    
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 94,705 $ 92,484
Percentage of Total Portfolio 2.90% 3.10%
Investment Type Concentration Risk | Total Investments Benchmark | Warrants    
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 27,833 $ 30,646
Percentage of Total Portfolio 0.90% 1.10%
Investment Type Concentration Risk | Total Investments Benchmark | Investment Funds & Vehicles    
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 4,683 $ 3,893
Percentage of Total Portfolio 0.10% 0.10%
Investment Type Concentration Risk | Total Investments Benchmark | Preferred Stock    
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 42,290 $ 41,488
Percentage of Total Portfolio 1.30% 1.40%