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Debt - Schedule of Total Debt Outstanding and Available (Details) - USD ($)
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Jul. 31, 2025
Mar. 18, 2024
Dec. 31, 2023
Aug. 04, 2023
Jun. 15, 2023
Feb. 28, 2023
Dec. 31, 2022
Dec. 31, 2021
Jun. 22, 2021
Line Of Credit Facility [Line Items]                      
Carrying Value [1] $ 1,040,842,703 $ 1,126,314,826     $ 988,555,830       $ 949,062,241 $ 1,019,339,449  
Available 482,786,814 519,329,212                  
Total Capacity 1,523,629,517 1,645,644,038                  
Unamortized issuance costs (5,299,866) (7,974,601)                  
Debt, net of unamortized issuance costs $ 1,035,542,837 $ 1,118,340,225                  
SOFR                      
Line Of Credit Facility [Line Items]                      
Rate 0.10% 0.10%                  
Debt, net of unamortized issuance costs $ 140,000,000 $ 113,000,000                  
Operating Facility                      
Line Of Credit Facility [Line Items]                      
Total Capacity $ 300,000,000                    
Operating Facility | LIBOR Member | Minimum                      
Line Of Credit Facility [Line Items]                      
Rate                     1.75%
Operating Facility | LIBOR Member | Maximum                      
Line Of Credit Facility [Line Items]                      
Rate                     2.00%
Operating Facility | SOFR                      
Line Of Credit Facility [Line Items]                      
Maturity 2029 2029                  
Rate 2.00% 2.00%         0.11%        
Carrying Value $ 146,213,186 $ 120,670,788                  
Available 153,786,814 179,329,212                  
Total Capacity 300,000,000 $ 300,000,000                  
Operating Facility | SOFR | Minimum                      
Line Of Credit Facility [Line Items]                      
Rate             1.75%        
Operating Facility | SOFR | Maximum                      
Line Of Credit Facility [Line Items]                      
Rate             2.00%        
Funding Facility II                      
Line Of Credit Facility [Line Items]                      
Rate     2.00%     2.05%   2.00%      
Total Capacity $ 200,000,000                    
Funding Facility II | LIBOR Member                      
Line Of Credit Facility [Line Items]                      
Rate 2.00%                    
Funding Facility II | SOFR                      
Line Of Credit Facility [Line Items]                      
Maturity 2029 2027                  
Rate 2.00% 2.05%       0.15%   0.15%      
Carrying Value $ 100,000,000 $ 75,000,000                  
Available 100,000,000 125,000,000                  
Total Capacity $ 200,000,000 $ 200,000,000                  
Merger Sub Facility                      
Line Of Credit Facility [Line Items]                      
Rate 0.10% 0.10%                  
Total Capacity       $ 265,000,000              
Merger Sub Facility | SOFR                      
Line Of Credit Facility [Line Items]                      
Maturity 2028 2028                  
Rate 2.00% 2.00%   1.00%              
Carrying Value $ 36,000,000 $ 60,000,000                  
Available 229,000,000 205,000,000                  
Total Capacity $ 265,000,000 $ 265,000,000                  
Merger Sub Facility | SOFR | Minimum                      
Line Of Credit Facility [Line Items]                      
Rate 1.75% 1.75%                  
Merger Sub Facility | SOFR | Maximum                      
Line Of Credit Facility [Line Items]                      
Rate 2.00% 2.00%                  
SBA Debentures                      
Line Of Credit Facility [Line Items]                      
Rate 2.41% 2.45%                  
Carrying Value $ 111,200,000 $ 131,500,000                  
Available 0 10,000,000                  
Total Capacity $ 111,200,000 $ 141,500,000                  
SBA Debentures | Minimum                      
Line Of Credit Facility [Line Items]                      
Maturity 2026 2025                  
SBA Debentures | Maximum                      
Line Of Credit Facility [Line Items]                      
Maturity 2031 2031                  
2025 Notes                      
Line Of Credit Facility [Line Items]                      
Maturity   2025                  
Rate   Fixed/Variable                  
Carrying Value   $ 92,000,000                  
Available   0                  
Total Capacity   $ 92,000,000                  
2026 Notes                      
Line Of Credit Facility [Line Items]                      
Maturity 2026 2026                  
Rate 2.85% 2.85%                  
Carrying Value $ 325,033,026 $ 325,398,402                  
Available 0 0                  
Total Capacity $ 325,033,026 $ 325,398,402                  
2029 Notes                      
Line Of Credit Facility [Line Items]                      
Maturity 2029 2029                  
Rate 6.95% 6.95%                  
Carrying Value $ 322,396,491 $ 321,745,636                  
Available 0 0                  
Total Capacity $ 322,396,491 $ 321,745,636                  
[1] Excludes unamortized debt issuance costs which are netted in the Consolidated Statements of Assets and Liabilities.