Quarterly report [Sections 13 or 15(d)]

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

v3.26.1
Investments - Schedule of Fair Value Portfolio of Investments by Geographic Location (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2026
Dec. 31, 2025
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 4,721,987 $ 4,466,647
Geographic Concentration Risk | Total Investments Benchmark, Geographical    
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 4,721,987 $ 4,466,647
Percentage of Total Portfolio 100.00% 100.00%
Geographic Concentration Risk | Total Investments Benchmark, Geographical | United States    
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 4,249,172 $ 4,035,927
Percentage of Total Portfolio 90.00% 90.40%
Geographic Concentration Risk | Total Investments Benchmark, Geographical | United Kingdom    
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 152,389 $ 118,031
Percentage of Total Portfolio 3.20% 2.70%
Geographic Concentration Risk | Total Investments Benchmark, Geographical | Netherlands    
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 115,004 $ 117,344
Percentage of Total Portfolio 2.40% 2.60%
Geographic Concentration Risk | Total Investments Benchmark, Geographical | Israel    
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 66,148 $ 67,280
Percentage of Total Portfolio 1.40% 1.50%
Geographic Concentration Risk | Total Investments Benchmark, Geographical | Germany    
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 49,417 $ 50,386
Percentage of Total Portfolio 1.10% 1.10%
Geographic Concentration Risk | Total Investments Benchmark, Geographical | Switzerland    
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 47,763 $ 35,504
Percentage of Total Portfolio 1.00% 0.80%
Geographic Concentration Risk | Total Investments Benchmark, Geographical | Canada    
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 18,432 $ 16,841
Percentage of Total Portfolio 0.40% 0.40%
Geographic Concentration Risk | Total Investments Benchmark, Geographical | Sweden    
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 18,395 $ 18,244
Percentage of Total Portfolio 0.40% 0.40%
Geographic Concentration Risk | Total Investments Benchmark, Geographical | Ireland    
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 4,770 $ 4,729
Percentage of Total Portfolio 0.10% 0.10%
Geographic Concentration Risk | Total Investments Benchmark, Geographical | Singapore    
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 0 $ 1,827
Percentage of Total Portfolio 0.00% 0.00%
Geographic Concentration Risk | Total Investments Benchmark, Geographical | Other    
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 497 $ 534
Percentage of Total Portfolio 0.00% 0.00%