v3.26.1
CONSOLIDATED SCHEDULE OF INVESTMENTS IN AND ADVANCES TO AFFILIATES - Schedule of Investment (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Jun. 30, 2025
Dec. 31, 2024
Schedule Of Investments [Line Items]        
Investment owned, percent of net assets 201.55% [1] 0.00% [2]    
Investment cost $ 4,603,266 [3] $ 4,467,968    
Investments, at fair value: $ 4,583,870 $ 4,466,647    
Control investments        
Schedule Of Investments [Line Items]        
Investment owned, percent of net assets 5.30% 5.19%    
Investment cost $ 112,877 $ 105,409    
Investments, at fair value: $ 120,533 $ 115,051 $ 114,896 $ 113,179
Control investments | Majority Owned Control Investments        
Schedule Of Investments [Line Items]        
Investment owned, percent of net assets 4.90% 4.77%    
Investment cost $ 90,464 $ 82,996    
Investments, at fair value: $ 111,501 $ 105,710 104,878 101,522
Control investments | Other Control Investments        
Schedule Of Investments [Line Items]        
Investment owned, percent of net assets 0.40% 0.42%    
Investment cost $ 22,413 $ 22,413    
Investments, at fair value: 9,032 9,341 10,018 11,657
Control investments | Coronado Aesthetics, LLC        
Schedule Of Investments [Line Items]        
Investments, at fair value: 222   313  
Control investments | Coronado Aesthetics, LLC | Majority Owned Control Investments | Preferred Stock        
Schedule Of Investments [Line Items]        
Investments, at fair value: 222 218 312 69
Control investments | Coronado Aesthetics, LLC | Majority Owned Control Investments | Common Stock        
Schedule Of Investments [Line Items]        
Investments, at fair value: 0 0 1 0
Control investments | Coronado Aesthetics, LLC | Diversified Financial Services | Majority Owned Control Investments        
Schedule Of Investments [Line Items]        
Investment cost 250 250    
Investments, at fair value: $ 222 $ 218    
Control investments | Coronado Aesthetics, LLC | Diversified Financial Services | Majority Owned Control Investments | Common Stock        
Schedule Of Investments [Line Items]        
Shares (in shares) 180,000 180,000    
Investment cost $ 0 $ 0    
Investments, at fair value: $ 0 $ 0    
Control investments | Coronado Aesthetics, LLC | Diversified Financial Services | Preferred Series A | Majority Owned Control Investments | Preferred Stock        
Schedule Of Investments [Line Items]        
Shares (in shares) 5,000,000 5,000,000    
Investment cost $ 250 $ 250    
Investments, at fair value: 222 218    
Control investments | Gibraltar Business Capital, LLC        
Schedule Of Investments [Line Items]        
Investments, at fair value: 62,744   60,343  
Control investments | Gibraltar Business Capital, LLC | Majority Owned Control Investments | Unsecured Debt        
Schedule Of Investments [Line Items]        
Investments, at fair value: 38,323 38,255 37,388 36,212
Control investments | Gibraltar Business Capital, LLC | Majority Owned Control Investments | Member Units        
Schedule Of Investments [Line Items]        
Investments, at fair value: 24,421 23,963 22,955 23,051
Control investments | Gibraltar Business Capital, LLC | Diversified Financial Services | Majority Owned Control Investments        
Schedule Of Investments [Line Items]        
Investment cost 70,179 70,711    
Investments, at fair value: $ 62,744 $ 62,218    
Control investments | Gibraltar Business Capital, LLC | Diversified Financial Services | Majority Owned Control Investments | Unsecured Debt One        
Schedule Of Investments [Line Items]        
Maturity Date 2029-07 2029-07    
Interest rate and floor, fixed 11.50% 3.45%    
Investment, interest rate, paid in kind   8.05%    
Principal amount $ 28,805 $ 28,805    
Investment cost 28,462 28,412    
Investments, at fair value: $ 28,462 $ 28,412    
Control investments | Gibraltar Business Capital, LLC | Diversified Financial Services | Majority Owned Control Investments | Unsecured Debt Two        
Schedule Of Investments [Line Items]        
Maturity Date 2029-07 2029-07    
Interest rate and floor, fixed 11.95% 11.95%    
Principal amount $ 10,000 $ 10,000    
Investment cost 9,861 9,843    
Investments, at fair value: $ 9,861 $ 9,843    
Control investments | Gibraltar Business Capital, LLC | Diversified Financial Services | Majority Owned Control Investments | Member Units        
Schedule Of Investments [Line Items]        
Shares (in shares) 1 1    
Investment cost $ 31,856 $ 32,456    
Investments, at fair value: 24,421 23,963    
Control investments | Hercules Adviser LLC        
Schedule Of Investments [Line Items]        
Investments, at fair value: 48,535   44,222  
Control investments | Hercules Adviser LLC | Majority Owned Control Investments | Unsecured Debt        
Schedule Of Investments [Line Items]        
Investments, at fair value: 8,000 0 0 12,000
Control investments | Hercules Adviser LLC | Majority Owned Control Investments | Member Units        
Schedule Of Investments [Line Items]        
Investments, at fair value: 40,535 43,274 44,222 30,190
Control investments | Hercules Adviser LLC | Diversified Financial Services | Majority Owned Control Investments        
Schedule Of Investments [Line Items]        
Investment cost 20,035 12,035    
Investments, at fair value: $ 48,535 $ 43,274    
Control investments | Hercules Adviser LLC | Diversified Financial Services | Majority Owned Control Investments | Unsecured Debt        
Schedule Of Investments [Line Items]        
Maturity Date 2027-03      
Interest rate and floor, fixed 6.75%      
Principal amount $ 8,000      
Investment cost 8,000      
Investments, at fair value: $ 8,000      
Control investments | Hercules Adviser LLC | Diversified Financial Services | Majority Owned Control Investments | Member Units        
Schedule Of Investments [Line Items]        
Shares (in shares) 1 1    
Investment cost $ 12,035 $ 12,035    
Investments, at fair value: 40,535 43,274    
Control investments | Tectura Corporation        
Schedule Of Investments [Line Items]        
Investments, at fair value: 9,032   10,018  
Control investments | Tectura Corporation | Other Control Investments | Preferred Stock        
Schedule Of Investments [Line Items]        
Investments, at fair value: 782 1,250 2,042 3,623
Control investments | Tectura Corporation | Other Control Investments | Common Stock        
Schedule Of Investments [Line Items]        
Investments, at fair value: 0 0 0 7
Control investments | Tectura Corporation | Other Control Investments | Senior Secured Debt        
Schedule Of Investments [Line Items]        
Investments, at fair value: 8,250 8,091 $ 7,976 $ 8,027
Control investments | Tectura Corporation | Consumer & Business Services | Other Control Investments        
Schedule Of Investments [Line Items]        
Investment cost 22,413 22,413    
Investments, at fair value: $ 9,032 $ 9,341    
Control investments | Tectura Corporation | Consumer & Business Services | Other Control Investments | Common Stock        
Schedule Of Investments [Line Items]        
Shares (in shares) 414,994,863 414,994,863    
Investment cost $ 900 $ 900    
Investments, at fair value: $ 0 $ 0    
Control investments | Tectura Corporation | Consumer & Business Services | Other Control Investments | Senior Secured Debt        
Schedule Of Investments [Line Items]        
Maturity Date 2027-01 2027-01    
Interest rate and floor, fixed 8.25% 8.25%    
Principal amount $ 8,250 $ 8,250    
Investment cost 8,250 8,250    
Investments, at fair value: $ 8,250 $ 8,091    
Control investments | Tectura Corporation | Consumer & Business Services | Preferred Series BB | Other Control Investments | Preferred Stock        
Schedule Of Investments [Line Items]        
Shares (in shares) 1,000,000 1,000,000    
Investment cost $ 0 $ 0    
Investments, at fair value: $ 0 $ 0    
Control investments | Tectura Corporation | Consumer & Business Services | Series C Preferred Stock | Other Control Investments | Preferred Stock        
Schedule Of Investments [Line Items]        
Shares (in shares) 3,235,298 3,235,298    
Investment cost $ 13,263 $ 13,263    
Investments, at fair value: $ 782 $ 1,250    
[1] Value as a percent of net assets. All amounts are stated in U.S. Dollars unless otherwise noted. The Company uses the Standard Industrial Code for classifying the industry grouping of its portfolio companies.
[2] Value as a percent of net assets. All amounts are stated in U.S. Dollars unless otherwise noted. The Company uses the Standard Industrial Code for classifying the industry grouping of its portfolio companies.
[3] Gross unrealized appreciation, gross unrealized depreciation, and net unrealized depreciation for federal income tax purposes totaled $114.8 million, $135.2 million and $20.4 million, respectively. The tax cost of investments is $4.6 billion