Quarterly report pursuant to Section 13 or 15(d)

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

v3.22.2.2
Investments - Schedule of Fair Value Portfolio of Investments by Asset Class (Details) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2022
Dec. 31, 2021
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 2,825,738 $ 2,434,522
Investment Funds And Vehicles    
Schedule Of Investments [Line Items]    
Investments at Fair Value 3,046 1,814
Senior Secured    
Schedule Of Investments [Line Items]    
Investments at Fair Value 2,607,006 2,156,709
Unsecured Debt    
Schedule Of Investments [Line Items]    
Investments at Fair Value 54,393 52,890
Preferred Note    
Schedule Of Investments [Line Items]    
Investments at Fair Value 41,038 69,439
Common Stock    
Schedule Of Investments [Line Items]    
Investments at Fair Value 93,096 115,271
Warrant    
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 27,159 $ 38,399
Investment Type Concentration Risk | Revenue Benchmark    
Schedule Of Investments [Line Items]    
Concentration Risk, Percentage 100.00% 100.00%
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 | Revenue Benchmark | Senior Secured    
Schedule Of Investments [Line Items]    
Concentration Risk, Percentage 92.30% 88.60%
Investment Type Concentration Risk | Revenue Benchmark | Unsecured Debt    
Schedule Of Investments [Line Items]    
Concentration Risk, Percentage 1.90% 2.20%
Investment Type Concentration Risk | Revenue Benchmark | Preferred Note    
Schedule Of Investments [Line Items]    
Concentration Risk, Percentage 1.40% 2.80%
Investment Type Concentration Risk | Revenue Benchmark | Common Stock    
Schedule Of Investments [Line Items]    
Concentration Risk, Percentage 3.30% 4.70%
Investment Type Concentration Risk | Revenue Benchmark | Warrant    
Schedule Of Investments [Line Items]    
Concentration Risk, Percentage 1.00% 1.60%
Geographic Concentration Risk [Member] | Revenue Benchmark    
Schedule Of Investments [Line Items]    
Concentration Risk, Percentage 100.00% 100.00%