Quarterly report pursuant to Section 13 or 15(d)

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

v3.23.2
Investments - Schedule of Fair Value Portfolio of Investments by Asset Class (Details) - USD ($)
$ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2023
Dec. 31, 2022
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 3,112,789 $ 2,963,955
Senior Secured    
Schedule Of Investments [Line Items]    
Investments at Fair Value 2,878,923 2,741,388
Unsecured Debt    
Schedule Of Investments [Line Items]    
Investments at Fair Value 59,019 54,056
Investment Funds And Vehicles    
Schedule Of Investments [Line Items]    
Investments at Fair Value 4,353 3,893
Preferred Stock | Equity    
Schedule Of Investments [Line Items]    
Investments at Fair Value 41,249 41,488
Common Stock | Equity    
Schedule Of Investments [Line Items]    
Investments at Fair Value 94,931 92,484
Warrants | Warrant    
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 34,314 $ 30,646
Geographic Concentration Risk [Member] | Revenue Benchmark    
Schedule Of Investments [Line Items]    
Concentration Risk, Percentage 100.00% 100.00%
Investment Type Concentration Risk | Revenue Benchmark    
Schedule Of Investments [Line Items]    
Concentration Risk, Percentage 100.00% 100.00%
Investment Type Concentration Risk | Revenue Benchmark | Senior Secured    
Schedule Of Investments [Line Items]    
Concentration Risk, Percentage 92.50% 92.50%
Investment Type Concentration Risk | Revenue Benchmark | Unsecured Debt    
Schedule Of Investments [Line Items]    
Concentration Risk, Percentage 1.90% 1.80%
Investment Type Concentration Risk | Revenue Benchmark | Investment Funds And Vehicles    
Schedule Of Investments [Line Items]    
Concentration Risk, Percentage 0.10% 0.10%
Investment Type Concentration Risk | Preferred Stock | Revenue Benchmark | Equity    
Schedule Of Investments [Line Items]    
Concentration Risk, Percentage 1.40% 1.40%
Investment Type Concentration Risk | Common Stock | Revenue Benchmark | Equity    
Schedule Of Investments [Line Items]    
Concentration Risk, Percentage 3.00% 3.10%
Investment Type Concentration Risk | Warrants | Revenue Benchmark | Warrant    
Schedule Of Investments [Line Items]    
Concentration Risk, Percentage 1.10% 1.10%