Quarterly report pursuant to Section 13 or 15(d)

Investments - Schedule of Fair Value Portfolio of Investments by Geographic Location (Details)

v3.22.2.2
Investments - Schedule of Fair Value Portfolio of Investments by Geographic Location (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
United States    
Schedule Of Investments [Line Items]    
Investments at Fair Value 2,545,973 2,138,184
United Kingdom    
Schedule Of Investments [Line Items]    
Investments at Fair Value 158,491 169,407
Netherlands    
Schedule Of Investments [Line Items]    
Investments at Fair Value 88,174 82,925
Canada    
Schedule Of Investments [Line Items]    
Investments at Fair Value 19,373 27,673
Israel    
Schedule Of Investments [Line Items]    
Investments at Fair Value 9,005 8,980
Ireland    
Schedule Of Investments [Line Items]    
Investments at Fair Value 3,313 5,459
Germany    
Schedule Of Investments [Line Items]    
Investments at Fair Value 924 1,894
Other    
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 485 $ 0
Geographic Concentration Risk [Member] | Revenue Benchmark    
Schedule Of Investments [Line Items]    
Concentration Risk, Percentage 100.00% 100.00%
Geographic Concentration Risk [Member] | Revenue Benchmark | United States    
Schedule Of Investments [Line Items]    
Concentration Risk, Percentage 90.10% 87.80%
Geographic Concentration Risk [Member] | Revenue Benchmark | United Kingdom    
Schedule Of Investments [Line Items]    
Concentration Risk, Percentage 5.60% 7.00%
Geographic Concentration Risk [Member] | Revenue Benchmark | Netherlands    
Schedule Of Investments [Line Items]    
Concentration Risk, Percentage 3.10% 3.40%
Geographic Concentration Risk [Member] | Revenue Benchmark | Canada    
Schedule Of Investments [Line Items]    
Concentration Risk, Percentage 0.70% 1.10%
Geographic Concentration Risk [Member] | Revenue Benchmark | Israel    
Schedule Of Investments [Line Items]    
Concentration Risk, Percentage 0.30% 0.40%
Geographic Concentration Risk [Member] | Revenue Benchmark | Ireland    
Schedule Of Investments [Line Items]    
Concentration Risk, Percentage 0.10% 0.20%
Geographic Concentration Risk [Member] | Revenue Benchmark | Germany    
Schedule Of Investments [Line Items]    
Concentration Risk, Percentage 0.10% 0.10%
Geographic Concentration Risk [Member] | Revenue Benchmark | Other    
Schedule Of Investments [Line Items]    
Concentration Risk, Percentage 0.00% 0.00%