v3.26.3
Investments - Schedule of Realized Gains and Losses and Changes in Unrealized Appreciation and Depreciation on Control and Affiliate investments (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Dec. 31, 2024
Schedule Of Investments [Line Items]            
Investments, at fair value: $ 4,845,903   $ 4,845,903   $ 4,466,647  
Interest & Dividend Income 134,226 $ 131,157 408,671 $ 376,300    
Fee Income 5,889 6,936 22,094 18,763    
Net Change in Unrealized Appreciation (Depreciation) 8,155 32,989 (7,284) 55,214    
Control and affiliated investments            
Schedule Of Investments [Line Items]            
Investments, at fair value: 125,066   125,066   115,051  
Interest & Dividend Income 3,565   10,428      
Fee Income 32   98      
Net Change in Unrealized Appreciation (Depreciation) (575)   (2,561)      
Realized Gain (Loss) 5   5      
Control Investments            
Schedule Of Investments [Line Items]            
Investments, at fair value: 122,030 112,323 122,030 112,323 115,051 $ 113,179
Interest & Dividend Income 3,565 3,397 10,428 10,402    
Fee Income 32 44 98 124    
Net Change in Unrealized Appreciation (Depreciation) (286) (2,541) (2,272) (1,400)    
Realized Gain (Loss) 0 0 0 0    
Control Investments | Coronado Aesthetics, LLC            
Schedule Of Investments [Line Items]            
Investments, at fair value: 180 344 180 344    
Interest & Dividend Income 0 0 0 0    
Fee Income 0 0 0 0    
Net Change in Unrealized Appreciation (Depreciation) (42) 31 (38) 275    
Realized Gain (Loss) 0 0 0 0    
Control Investments | Gibraltar Acquisition LLC            
Schedule Of Investments [Line Items]            
Investments, at fair value: 62,136 60,193 62,136 60,193    
Interest & Dividend Income 1,153 1,123 3,422 3,786    
Fee Income 32 44 98 124    
Net Change in Unrealized Appreciation (Depreciation) (242) (118) 816 386    
Realized Gain (Loss) 0 0 0 0    
Control Investments | Hercules Adviser LLC            
Schedule Of Investments [Line Items]            
Investments, at fair value: 49,942 43,510 49,942 43,510    
Interest & Dividend Income 2,238 2,100 6,491 6,100    
Fee Income 0 0 0 0    
Net Change in Unrealized Appreciation (Depreciation) (742) (712) (3,481) 1,320    
Realized Gain (Loss) 0 0 0 0    
Control Investments | Tectura Corporation            
Schedule Of Investments [Line Items]            
Investments, at fair value: 9,772 8,276 9,772 8,276    
Interest & Dividend Income 174 174 515 516    
Fee Income 0 0 0 0    
Net Change in Unrealized Appreciation (Depreciation) 740 (1,742) 431 (3,381)    
Realized Gain (Loss) 0 0 0 0    
Affiliate Investments            
Schedule Of Investments [Line Items]            
Investments, at fair value: 3,036   3,036   $ 0  
Interest & Dividend Income 0   0      
Fee Income 0   0      
Net Change in Unrealized Appreciation (Depreciation) (289) 0 (289) 0    
Realized Gain (Loss) 5 $ 0 5 $ 0    
Affiliate Investments | Annex Cloud            
Schedule Of Investments [Line Items]            
Investments, at fair value: 3,036   3,036      
Interest & Dividend Income 0   0      
Fee Income 0   0      
Net Change in Unrealized Appreciation (Depreciation) (289)   (289)      
Realized Gain (Loss) $ 5   $ 5