Quarterly report [Sections 13 or 15(d)]

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

v3.25.2
Investments - Schedule of Fair Value Portfolio of Investments by Geographic Location (Details) - USD ($)
$ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2025
Dec. 31, 2024
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 4,176,486 $ 3,659,978
Geographic Concentration Risk | Total Investments Benchmark, Geographical    
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 4,176,486 $ 3,659,978
Percentage of Total Portfolio 100.00% 100.00%
Geographic Concentration Risk | United States | Total Investments Benchmark, Geographical    
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 3,759,076 $ 3,288,737
Percentage of Total Portfolio 90.00% 89.90%
Geographic Concentration Risk | United Kingdom | Total Investments Benchmark, Geographical    
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 131,617 $ 142,183
Percentage of Total Portfolio 3.20% 3.90%
Geographic Concentration Risk | Netherlands | Total Investments Benchmark, Geographical    
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 124,548 $ 59,157
Percentage of Total Portfolio 3.00% 1.60%
Geographic Concentration Risk | Germany | Total Investments Benchmark, Geographical    
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 49,771 $ 49,255
Percentage of Total Portfolio 1.20% 1.30%
Geographic Concentration Risk | Israel | Total Investments Benchmark, Geographical    
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 44,767 $ 88,066
Percentage of Total Portfolio 1.10% 2.40%
Geographic Concentration Risk | Switzerland | Total Investments Benchmark, Geographical    
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 34,255 $ 0
Percentage of Total Portfolio 0.80% 0.00%
Geographic Concentration Risk | Canada | Total Investments Benchmark, Geographical    
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 16,321 $ 16,251
Percentage of Total Portfolio 0.40% 0.40%
Geographic Concentration Risk | Denmark | Total Investments Benchmark, Geographical    
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 9,231 $ 9,284
Percentage of Total Portfolio 0.20% 0.30%
Geographic Concentration Risk | Ireland | Total Investments Benchmark, Geographical    
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 4,622 $ 4,649
Percentage of Total Portfolio 0.10% 0.10%
Geographic Concentration Risk | Singapore | Total Investments Benchmark, Geographical    
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 1,915 $ 1,996
Percentage of Total Portfolio 0.00% 0.10%
Geographic Concentration Risk | Other | Total Investments Benchmark, Geographical    
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 363 $ 400
Percentage of Total Portfolio 0.00% 0.00%