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

Schedule 12-14s - CONSOLIDATED SCHEDULE OF INVESTMENTS IN AND ADVANCES TO AFFILIATES - Summary of Schedule of Investment Gain/Loss (Details)

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Schedule 12-14s - CONSOLIDATED SCHEDULE OF INVESTMENTS IN AND ADVANCES TO AFFILIATES - Summary of Schedule of Investment Gain/Loss (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Investments in and Advances to Affiliates [Line Items]      
Amount of Interest and Fees Credited to Income $ 532,493 $ 493,591 $ 460,668
Fair value beginning balance 3,659,978    
Total net change in unrealized appreciation (depreciation) 38,812 (31,209) 25,010
Fair value ending balance 4,466,647 3,659,978  
Control investments      
Investments in and Advances to Affiliates [Line Items]      
Amount of Interest and Fees Credited to Income 13,986 13,549  
Realized Gain (Loss) 0 0 0
Fair value beginning balance 113,179 115,004  
Gross Additions 14,043 1,734  
Gross Reductions (13,550) 0  
Total net change in unrealized appreciation (depreciation) 1,379 (3,559) 22,634
Fair value ending balance 115,051 113,179 115,004
Majority Owned Control Investments | Control investments      
Investments in and Advances to Affiliates [Line Items]      
Amount of Interest and Fees Credited to Income 13,296 12,857  
Realized Gain (Loss) 0 0  
Fair value beginning balance 101,522 103,487  
Gross Additions 14,043 1,734  
Gross Reductions (13,550) 0  
Total net change in unrealized appreciation (depreciation) 3,695 (3,699)  
Fair value ending balance 105,710 101,522 103,487
Other Control Investments | Control investments      
Investments in and Advances to Affiliates [Line Items]      
Amount of Interest and Fees Credited to Income 690 692  
Realized Gain (Loss) 0 0  
Fair value beginning balance 11,657 11,517  
Gross Additions 0 0  
Gross Reductions 0 0  
Total net change in unrealized appreciation (depreciation) (2,316) 140  
Fair value ending balance 9,341 11,657 11,517
Coronado Aesthetics, LLC | Control investments      
Investments in and Advances to Affiliates [Line Items]      
Realized Gain (Loss) 0 0 0
Fair value beginning balance 69 262  
Total net change in unrealized appreciation (depreciation) 149 (193) (57)
Fair value ending balance 218 69 262
Coronado Aesthetics, LLC | Majority Owned Control Investments | Control investments | Preferred Stock      
Investments in and Advances to Affiliates [Line Items]      
Amount of Interest and Fees Credited to Income 0 0  
Realized Gain (Loss) 0 0  
Fair value beginning balance 69 260  
Gross Additions 0 0  
Gross Reductions 0 0  
Total net change in unrealized appreciation (depreciation) 149 (191)  
Fair value ending balance 218 69 260
Coronado Aesthetics, LLC | Majority Owned Control Investments | Control investments | Common Stock      
Investments in and Advances to Affiliates [Line Items]      
Amount of Interest and Fees Credited to Income 0 0  
Realized Gain (Loss) 0 0  
Fair value beginning balance 0 2  
Gross Additions 0 0  
Gross Reductions 0 0  
Total net change in unrealized appreciation (depreciation) 0 (2)  
Fair value ending balance 0 0 2
Gibraltar Acquisition LLC | Control investments      
Investments in and Advances to Affiliates [Line Items]      
Realized Gain (Loss) 0 0 0
Fair value beginning balance 59,263 62,512  
Total net change in unrealized appreciation (depreciation) 2,462 (4,983) 9,656
Fair value ending balance 62,218 59,263 62,512
Gibraltar Acquisition LLC | Majority Owned Control Investments | Control investments | Unsecured Debt      
Investments in and Advances to Affiliates [Line Items]      
Amount of Interest and Fees Credited to Income 5,096 5,447  
Realized Gain (Loss) 0 0  
Fair value beginning balance 36,212 34,478  
Gross Additions 2,043 1,734  
Gross Reductions 0 0  
Total net change in unrealized appreciation (depreciation) 0 0  
Fair value ending balance 38,255 36,212 34,478
Gibraltar Acquisition LLC | Majority Owned Control Investments | Control investments | Member Units      
Investments in and Advances to Affiliates [Line Items]      
Amount of Interest and Fees Credited to Income 0 0  
Realized Gain (Loss) 0 0  
Fair value beginning balance 23,051 28,034  
Gross Additions 0 0  
Gross Reductions (1,550) 0  
Total net change in unrealized appreciation (depreciation) 2,462 (4,983)  
Fair value ending balance 23,963 23,051 28,034
Hercules Adviser LLC(3) | Control investments      
Investments in and Advances to Affiliates [Line Items]      
Realized Gain (Loss) 0 0 0
Fair value beginning balance 42,190 40,713  
Total net change in unrealized appreciation (depreciation) 1,084 1,477 9,560
Fair value ending balance 43,274 42,190 40,713
Hercules Adviser LLC(3) | Majority Owned Control Investments | Control investments | Unsecured Debt      
Investments in and Advances to Affiliates [Line Items]      
Amount of Interest and Fees Credited to Income 8,200 7,410  
Realized Gain (Loss) 0 0  
Fair value beginning balance 12,000 12,000  
Gross Additions 0 0  
Gross Reductions (12,000) 0  
Total net change in unrealized appreciation (depreciation) 0 0  
Fair value ending balance 0 12,000 12,000
Hercules Adviser LLC(3) | Majority Owned Control Investments | Control investments | Member Units      
Investments in and Advances to Affiliates [Line Items]      
Amount of Interest and Fees Credited to Income 0 0  
Realized Gain (Loss) 0 0  
Fair value beginning balance 30,190 28,713  
Gross Additions 12,000 0  
Gross Reductions 0 0  
Total net change in unrealized appreciation (depreciation) 1,084 1,477  
Fair value ending balance 43,274 30,190 28,713
Tectura Corporation | Control investments      
Investments in and Advances to Affiliates [Line Items]      
Realized Gain (Loss) 0 0 0
Fair value beginning balance 11,657 11,517  
Total net change in unrealized appreciation (depreciation) (2,316) 140 3,475
Fair value ending balance 9,341 11,657 11,517
Tectura Corporation | Other Control Investments | Control investments | Senior Secured Debt      
Investments in and Advances to Affiliates [Line Items]      
Amount of Interest and Fees Credited to Income 690 692  
Realized Gain (Loss) 0 0  
Fair value beginning balance 8,027 8,250  
Gross Additions 0 0  
Gross Reductions 0 0  
Total net change in unrealized appreciation (depreciation) 64 (223)  
Fair value ending balance 8,091 8,027 8,250
Tectura Corporation | Other Control Investments | Control investments | Preferred Stock      
Investments in and Advances to Affiliates [Line Items]      
Amount of Interest and Fees Credited to Income 0 0  
Realized Gain (Loss) 0 0  
Fair value beginning balance 3,623 3,263  
Gross Additions 0 0  
Gross Reductions 0 0  
Total net change in unrealized appreciation (depreciation) (2,373) 360  
Fair value ending balance 1,250 3,623 3,263
Tectura Corporation | Other Control Investments | Control investments | Common Stock      
Investments in and Advances to Affiliates [Line Items]      
Amount of Interest and Fees Credited to Income 0 0  
Realized Gain (Loss) 0 0  
Fair value beginning balance 7 4  
Gross Additions 0 0  
Gross Reductions 0 0  
Total net change in unrealized appreciation (depreciation) (7) 3  
Fair value ending balance $ 0 $ 7 $ 4