Quarterly report pursuant to Section 13 or 15(d)

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

v3.23.2
Investments - Schedule of Fair Value Portfolio of Investments by Geographic Location (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
United States    
Schedule Of Investments [Line Items]    
Investments at Fair Value 2,755,178 2,670,520
United Kingdom    
Schedule Of Investments [Line Items]    
Investments at Fair Value 200,455 171,629
Netherlands    
Schedule Of Investments [Line Items]    
Investments at Fair Value 87,664 88,915
Canada    
Schedule Of Investments [Line Items]    
Investments at Fair Value 11,264 19,472
Israel    
Schedule Of Investments [Line Items]    
Investments at Fair Value 53,019 9,052
Denmark    
Schedule Of Investments [Line Items]    
Investments at Fair Value 3,767 0
Ireland    
Schedule Of Investments [Line Items]    
Investments at Fair Value 0 2,804
Germany    
Schedule Of Investments [Line Items]    
Investments at Fair Value 999 990
Other    
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 443 $ 573
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 88.50% 90.10%
Geographic Concentration Risk [Member] | Revenue Benchmark | United Kingdom    
Schedule Of Investments [Line Items]    
Concentration Risk, Percentage 6.50% 5.80%
Geographic Concentration Risk [Member] | Revenue Benchmark | Netherlands    
Schedule Of Investments [Line Items]    
Concentration Risk, Percentage 2.80% 3.00%
Geographic Concentration Risk [Member] | Revenue Benchmark | Canada    
Schedule Of Investments [Line Items]    
Concentration Risk, Percentage 0.40% 0.70%
Geographic Concentration Risk [Member] | Revenue Benchmark | Israel    
Schedule Of Investments [Line Items]    
Concentration Risk, Percentage 1.70% 0.30%
Geographic Concentration Risk [Member] | Revenue Benchmark | Denmark    
Schedule Of Investments [Line Items]    
Concentration Risk, Percentage 0.10% 0.00%
Geographic Concentration Risk [Member] | Revenue Benchmark | Ireland    
Schedule Of Investments [Line Items]    
Concentration Risk, Percentage 0.00% 0.10%
Geographic Concentration Risk [Member] | Revenue Benchmark | Germany    
Schedule Of Investments [Line Items]    
Concentration Risk, Percentage 0.00% 0.00%
Geographic Concentration Risk [Member] | Revenue Benchmark | Other    
Schedule Of Investments [Line Items]    
Concentration Risk, Percentage 0.00% 0.00%