Annual report [Section 13 and 15(d), not S-K Item 405]

Investments - Schedule of Fair Value Portfolio By Industry Sector (Details)

v3.25.4
Investments - Schedule of Fair Value Portfolio By Industry Sector (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 4,466,647 $ 3,659,978
Industry Sub Sector Concentration Risk | Total Industry Sectors    
Schedule Of Investments [Line Items]    
Investments at Fair Value 4,466,647 3,659,978
Industry Sub Sector Concentration Risk | Application Software    
Schedule Of Investments [Line Items]    
Investments at Fair Value 1,087,954 790,180
Industry Sub Sector Concentration Risk | Drug Discovery & Development    
Schedule Of Investments [Line Items]    
Investments at Fair Value 1,039,712 1,080,390
Industry Sub Sector Concentration Risk | Healthcare Services, Other    
Schedule Of Investments [Line Items]    
Investments at Fair Value 838,508 610,184
Industry Sub Sector Concentration Risk | System Software    
Schedule Of Investments [Line Items]    
Investments at Fair Value 472,144 290,920
Industry Sub Sector Concentration Risk | Consumer & Business Services    
Schedule Of Investments [Line Items]    
Investments at Fair Value 449,631 372,641
Industry Sub Sector Concentration Risk | Defense Technologies    
Schedule Of Investments [Line Items]    
Investments at Fair Value 140,458 0
Industry Sub Sector Concentration Risk | Diversified Financial Services    
Schedule Of Investments [Line Items]    
Investments at Fair Value 105,896 113,491
Industry Sub Sector Concentration Risk | Medical Devices & Equipment    
Schedule Of Investments [Line Items]    
Investments at Fair Value 77,257 74,962
Industry Sub Sector Concentration Risk | Electronics & Computer Hardware    
Schedule Of Investments [Line Items]    
Investments at Fair Value 66,992 162,888
Industry Sub Sector Concentration Risk | Space Technologies    
Schedule Of Investments [Line Items]    
Investments at Fair Value 47,816 45,700
Industry Sub Sector Concentration Risk | Sustainable and Renewable Technology    
Schedule Of Investments [Line Items]    
Investments at Fair Value 35,759 27,696
Industry Sub Sector Concentration Risk | Communications & Networking    
Schedule Of Investments [Line Items]    
Investments at Fair Value 26,263 27,700
Industry Sub Sector Concentration Risk | Information Services    
Schedule Of Investments [Line Items]    
Investments at Fair Value 25,889 24,356
Industry Sub Sector Concentration Risk | Biotechnology Tools    
Schedule Of Investments [Line Items]    
Investments at Fair Value 23,164 35,434
Industry Sub Sector Concentration Risk | Manufacturing Technology    
Schedule Of Investments [Line Items]    
Investments at Fair Value 20,190 1,162
Industry Sub Sector Concentration Risk | Consumer & Business Products    
Schedule Of Investments [Line Items]    
Investments at Fair Value 8,810 1,497
Industry Sub Sector Concentration Risk | Semiconductors    
Schedule Of Investments [Line Items]    
Investments at Fair Value 158 704
Industry Sub Sector Concentration Risk | Media/Content/Info    
Schedule Of Investments [Line Items]    
Investments at Fair Value 32 63
Industry Sub Sector Concentration Risk | Drug Delivery    
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 14 $ 10
Industry Sub Sector Concentration Risk | Industry Sub Sector Investments Benchmark | Total Industry Sectors    
Schedule Of Investments [Line Items]    
Percentage of Total Portfolio 100.00% 100.00%
Industry Sub Sector Concentration Risk | Industry Sub Sector Investments Benchmark | Application Software    
Schedule Of Investments [Line Items]    
Percentage of Total Portfolio 24.30% 21.60%
Industry Sub Sector Concentration Risk | Industry Sub Sector Investments Benchmark | Drug Discovery & Development    
Schedule Of Investments [Line Items]    
Percentage of Total Portfolio 23.30% 29.50%
Industry Sub Sector Concentration Risk | Industry Sub Sector Investments Benchmark | Healthcare Services, Other    
Schedule Of Investments [Line Items]    
Percentage of Total Portfolio 18.80% 16.70%
Industry Sub Sector Concentration Risk | Industry Sub Sector Investments Benchmark | System Software    
Schedule Of Investments [Line Items]    
Percentage of Total Portfolio 10.60% 7.90%
Industry Sub Sector Concentration Risk | Industry Sub Sector Investments Benchmark | Consumer & Business Services    
Schedule Of Investments [Line Items]    
Percentage of Total Portfolio 10.10% 10.20%
Industry Sub Sector Concentration Risk | Industry Sub Sector Investments Benchmark | Defense Technologies    
Schedule Of Investments [Line Items]    
Percentage of Total Portfolio 3.10% 0.00%
Industry Sub Sector Concentration Risk | Industry Sub Sector Investments Benchmark | Diversified Financial Services    
Schedule Of Investments [Line Items]    
Percentage of Total Portfolio 2.40% 3.10%
Industry Sub Sector Concentration Risk | Industry Sub Sector Investments Benchmark | Medical Devices & Equipment    
Schedule Of Investments [Line Items]    
Percentage of Total Portfolio 1.70% 2.00%
Industry Sub Sector Concentration Risk | Industry Sub Sector Investments Benchmark | Electronics & Computer Hardware    
Schedule Of Investments [Line Items]    
Percentage of Total Portfolio 1.50% 4.50%
Industry Sub Sector Concentration Risk | Industry Sub Sector Investments Benchmark | Space Technologies    
Schedule Of Investments [Line Items]    
Percentage of Total Portfolio 1.10% 1.20%
Industry Sub Sector Concentration Risk | Industry Sub Sector Investments Benchmark | Sustainable and Renewable Technology    
Schedule Of Investments [Line Items]    
Percentage of Total Portfolio 0.80% 0.80%
Industry Sub Sector Concentration Risk | Industry Sub Sector Investments Benchmark | Communications & Networking    
Schedule Of Investments [Line Items]    
Percentage of Total Portfolio 0.60% 0.80%
Industry Sub Sector Concentration Risk | Industry Sub Sector Investments Benchmark | Information Services    
Schedule Of Investments [Line Items]    
Percentage of Total Portfolio 0.60% 0.70%
Industry Sub Sector Concentration Risk | Industry Sub Sector Investments Benchmark | Biotechnology Tools    
Schedule Of Investments [Line Items]    
Percentage of Total Portfolio 0.50% 1.00%
Industry Sub Sector Concentration Risk | Industry Sub Sector Investments Benchmark | Manufacturing Technology    
Schedule Of Investments [Line Items]    
Percentage of Total Portfolio 0.40% 0.00%
Industry Sub Sector Concentration Risk | Industry Sub Sector Investments Benchmark | Consumer & Business Products    
Schedule Of Investments [Line Items]    
Percentage of Total Portfolio 0.20% 0.00%
Industry Sub Sector Concentration Risk | Industry Sub Sector Investments Benchmark | Semiconductors    
Schedule Of Investments [Line Items]    
Percentage of Total Portfolio 0.00% 0.00%
Industry Sub Sector Concentration Risk | Industry Sub Sector Investments Benchmark | Media/Content/Info    
Schedule Of Investments [Line Items]    
Percentage of Total Portfolio 0.00% 0.00%
Industry Sub Sector Concentration Risk | Industry Sub Sector Investments Benchmark | Drug Delivery    
Schedule Of Investments [Line Items]    
Percentage of Total Portfolio 0.00% 0.00%