v3.26.3
Investments - Schedule of Fair Value Portfolio by Industry Sector (Details) - USD ($)
$ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2026
Dec. 31, 2025
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 4,845,903 $ 4,466,647
Industry Sub Sector Concentration Risk | Total Industry Sectors    
Schedule Of Investments [Line Items]    
Investments at Fair Value 4,845,903 4,466,647
Industry Sub Sector Concentration Risk | Application Software    
Schedule Of Investments [Line Items]    
Investments at Fair Value 1,124,669 1,045,146
Industry Sub Sector Concentration Risk | Drug Discovery & Development    
Schedule Of Investments [Line Items]    
Investments at Fair Value 1,021,317 1,039,712
Industry Sub Sector Concentration Risk | Healthcare Services, Other    
Schedule Of Investments [Line Items]    
Investments at Fair Value 909,478 776,321
Industry Sub Sector Concentration Risk | Consumer & Business Services    
Schedule Of Investments [Line Items]    
Investments at Fair Value 367,226 441,467
Industry Sub Sector Concentration Risk | Defense Technologies    
Schedule Of Investments [Line Items]    
Investments at Fair Value 312,021 140,458
Industry Sub Sector Concentration Risk | Cybersecurity    
Schedule Of Investments [Line Items]    
Investments at Fair Value 200,668 163,932
Industry Sub Sector Concentration Risk | Healthcare Technology & Digital Health    
Schedule Of Investments [Line Items]    
Investments at Fair Value 136,408 126,476
Industry Sub Sector Concentration Risk | System Software    
Schedule Of Investments [Line Items]    
Investments at Fair Value 121,824 308,613
Industry Sub Sector Concentration Risk | Medical Devices & Equipment    
Schedule Of Investments [Line Items]    
Investments at Fair Value 118,674 77,257
Industry Sub Sector Concentration Risk | Diversified Financial Services    
Schedule Of Investments [Line Items]    
Investments at Fair Value 112,078 105,896
Industry Sub Sector Concentration Risk | Biotechnology Tools    
Schedule Of Investments [Line Items]    
Investments at Fair Value 79,433 23,164
Industry Sub Sector Concentration Risk | Electronics & Computer Hardware    
Schedule Of Investments [Line Items]    
Investments at Fair Value 67,947 66,992
Industry Sub Sector Concentration Risk | Space Technologies    
Schedule Of Investments [Line Items]    
Investments at Fair Value 61,742 47,816
Industry Sub Sector Concentration Risk | Energy Technologies    
Schedule Of Investments [Line Items]    
Investments at Fair Value 59,307 30,346
Industry Sub Sector Concentration Risk | Consumer & Business Products    
Schedule Of Investments [Line Items]    
Investments at Fair Value 41,387 8,810
Industry Sub Sector Concentration Risk | Manufacturing Technology    
Schedule Of Investments [Line Items]    
Investments at Fair Value 39,350 20,190
Industry Sub Sector Concentration Risk | Communications & Networking    
Schedule Of Investments [Line Items]    
Investments at Fair Value 33,652 26,263
Industry Sub Sector Concentration Risk | Financial Technologies    
Schedule Of Investments [Line Items]    
Investments at Fair Value 26,576 8,971
Industry Sub Sector Concentration Risk | Sustainable and Renewable Technology    
Schedule Of Investments [Line Items]    
Investments at Fair Value 8,000 5,413
Industry Sub Sector Concentration Risk | Information Services    
Schedule Of Investments [Line Items]    
Investments at Fair Value 3,759 3,200
Industry Sub Sector Concentration Risk | Semiconductors    
Schedule Of Investments [Line Items]    
Investments at Fair Value 329 158
Industry Sub Sector Concentration Risk | Media/Content/Info    
Schedule Of Investments [Line Items]    
Investments at Fair Value 44 32
Industry Sub Sector Concentration Risk | Drug Delivery    
Schedule Of Investments [Line Items]    
Investments at Fair Value $ 14 $ 14
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 23.20% 23.40%
Industry Sub Sector Concentration Risk | Industry Sub Sector Investments Benchmark | Drug Discovery & Development    
Schedule Of Investments [Line Items]    
Percentage of Total Portfolio 21.10% 23.30%
Industry Sub Sector Concentration Risk | Industry Sub Sector Investments Benchmark | Healthcare Services, Other    
Schedule Of Investments [Line Items]    
Percentage of Total Portfolio 18.80% 17.40%
Industry Sub Sector Concentration Risk | Industry Sub Sector Investments Benchmark | Consumer & Business Services    
Schedule Of Investments [Line Items]    
Percentage of Total Portfolio 7.60% 9.90%
Industry Sub Sector Concentration Risk | Industry Sub Sector Investments Benchmark | Defense Technologies    
Schedule Of Investments [Line Items]    
Percentage of Total Portfolio 6.40% 3.10%
Industry Sub Sector Concentration Risk | Industry Sub Sector Investments Benchmark | Cybersecurity    
Schedule Of Investments [Line Items]    
Percentage of Total Portfolio 4.10% 3.70%
Industry Sub Sector Concentration Risk | Industry Sub Sector Investments Benchmark | Healthcare Technology & Digital Health    
Schedule Of Investments [Line Items]    
Percentage of Total Portfolio 2.80% 2.80%
Industry Sub Sector Concentration Risk | Industry Sub Sector Investments Benchmark | System Software    
Schedule Of Investments [Line Items]    
Percentage of Total Portfolio 2.50% 6.90%
Industry Sub Sector Concentration Risk | Industry Sub Sector Investments Benchmark | Medical Devices & Equipment    
Schedule Of Investments [Line Items]    
Percentage of Total Portfolio 2.50% 1.70%
Industry Sub Sector Concentration Risk | Industry Sub Sector Investments Benchmark | Diversified Financial Services    
Schedule Of Investments [Line Items]    
Percentage of Total Portfolio 2.30% 2.40%
Industry Sub Sector Concentration Risk | Industry Sub Sector Investments Benchmark | Biotechnology Tools    
Schedule Of Investments [Line Items]    
Percentage of Total Portfolio 1.60% 0.50%
Industry Sub Sector Concentration Risk | Industry Sub Sector Investments Benchmark | Electronics & Computer Hardware    
Schedule Of Investments [Line Items]    
Percentage of Total Portfolio 1.40% 1.50%
Industry Sub Sector Concentration Risk | Industry Sub Sector Investments Benchmark | Space Technologies    
Schedule Of Investments [Line Items]    
Percentage of Total Portfolio 1.30% 1.10%
Industry Sub Sector Concentration Risk | Industry Sub Sector Investments Benchmark | Energy Technologies    
Schedule Of Investments [Line Items]    
Percentage of Total Portfolio 1.20% 0.70%
Industry Sub Sector Concentration Risk | Industry Sub Sector Investments Benchmark | Consumer & Business Products    
Schedule Of Investments [Line Items]    
Percentage of Total Portfolio 0.90% 0.20%
Industry Sub Sector Concentration Risk | Industry Sub Sector Investments Benchmark | Manufacturing Technology    
Schedule Of Investments [Line Items]    
Percentage of Total Portfolio 0.80% 0.40%
Industry Sub Sector Concentration Risk | Industry Sub Sector Investments Benchmark | Communications & Networking    
Schedule Of Investments [Line Items]    
Percentage of Total Portfolio 0.70% 0.60%
Industry Sub Sector Concentration Risk | Industry Sub Sector Investments Benchmark | Financial Technologies    
Schedule Of Investments [Line Items]    
Percentage of Total Portfolio 0.50% 0.20%
Industry Sub Sector Concentration Risk | Industry Sub Sector Investments Benchmark | Sustainable and Renewable Technology    
Schedule Of Investments [Line Items]    
Percentage of Total Portfolio 0.20% 0.10%
Industry Sub Sector Concentration Risk | Industry Sub Sector Investments Benchmark | Information Services    
Schedule Of Investments [Line Items]    
Percentage of Total Portfolio 0.10% 0.10%
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%