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Supplementary Data (Unaudited) - Schedule of Financial Highlights (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Investment Company, Financial Highlights [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Per share NAV at beginning of period |  | $ 9.23 |  | $ 11.9 |  | $ 12.93 |  | $ 14.36 |  | $ 13.24 |  |  |  |  |  |
Net investment income before excise taxes |  | 1.29 |  | 1.66 |  | 1.85 |  | 1.53 |  | 1.26 |  |  |  |  |  |
Excise taxes |  | (0.01) |  | 0 |  | (0.01) |  | 0 |  | 0 |  |  |  |  |  |
Net investment income | [1] | 1.28 |  | 1.66 |  | 1.84 |  | 1.53 |  | 1.26 |  |  |  |  |  |
Net realized and unrealized gain (loss) | [1] | (2.33) |  | (2.6) |  | (1.18) |  | (1.69) |  | 1.17 |  |  |  |  |  |
Total from investment operations |  | (1.05) |  | (0.94) |  | 0.66 |  | (0.16) |  | 2.43 |  |  |  |  |  |
Repurchase of common stock |  | 0.01 |  | 0.01 |  | 0 |  | 0 |  | 0 |  |  |  |  |  |
Loss on extinguishment of debt |  | 0 |  | 0 |  | 0 |  | 0 |  | (0.11) |  |  |  |  |  |
Ordinary income dividends |  | (1.12) |  | (1.46) |  | (1.69) |  | (1.27) |  | (1.2) |  |  |  |  |  |
Tax basis returns of capital |  | 0 |  | 0 |  | 0 |  | 0 |  | 0 |  |  |  |  |  |
Dividends to common shareholders | [2] | (1.12) |  | (1.46) |  | (1.69) |  | (1.27) |  | (1.2) |  |  |  |  |  |
Per share NAV at end of period |  | 7.07 |  | 9.23 |  | 11.9 |  | 12.93 |  | 14.36 |  | $ 13.24 |  |  |  |
Per share market price at end of period |  | $ 5.47 |  | $ 8.71 |  | $ 11.54 |  | $ 12.94 |  | $ 13.51 |  |  |  |  |  |
Total return based on market value | [3] | (24.30%) |  | (11.90%) |  | 2.20% |  | 5.20% |  | 30.90% |  |  |  |  |  |
Total return based on net asset value | [4] | (11.30%) |  | (10.20%) |  | 5.10% |  | (1.10%) |  | 17.50% |  |  |  |  |  |
Net investment income | [5] | 14.50% |  | 15.60% |  | 14.20% |  | 10.80% |  | 9.00% |  |  |  |  |  |
Ending common shareholder equity |  | $ 598,013,197 |  | $ 785,123,667 |  | $ 687,601,546 |  | $ 746,753,790 |  | $ 829,456,636 |  |  |  |  |  |
Portfolio turnover rate |  | 15.80% |  | 18.30% |  | 13.50% |  | 19.40% |  | 35.60% |  |  |  |  |  |
Weighted-average debt outstanding |  | $ 1,115,102,969 |  | $ 1,234,022,372 |  | $ 1,001,667,440 |  | $ 1,023,880,532 |  | $ 985,506,056 |  |  |  |  |  |
Weighted-average interest rate on debt |  | 5.30% |  | 5.40% |  | 4.40% |  | 3.50% |  | 3.60% |  |  |  |  |  |
Weighted-average number of common shares |  | 84,988,524 |  | 79,670,868 |  | 57,767,264 |  | 57,767,264 |  | 57,767,264 |  |  |  |  |  |
Weighted Average Debt Per Share |  | $ 13.12 |  | $ 15.49 |  | $ 17.34 |  | $ 17.72 |  | $ 17.06 |  |  |  |  |  |
Asset Coverage: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt outstanding | [6] | $ 1,040,842,703 |  | $ 1,126,314,826 |  | $ 988,555,830 |  | $ 949,062,241 |  | $ 1,019,339,449 |  |  |  |  |  |
Asset coverage per $1,000 of debt outstanding |  | $ 1,642 | [7] | $ 1,789 | [7] | $ 1,643 | [7] | $ 1,929 | [7] | $ 1,948 | [7] | $ 2,058 | $ 1,992 | $ 2,157 | $ 2,335 | $ 2,352
Supplementary Data |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investment Company, Financial Highlights [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Per share NAV at beginning of period |  |  |  |  |  |  |  |  |  | $ 13.24 |  | $ 13.21 | $ 14.13 | $ 14.8 | $ 14.91 | $ 14.78
Net investment income before excise taxes |  |  |  |  |  |  |  |  |  |  |  | 1.43 | 1.61 | 1.59 | 1.99 | 1.88
Excise taxes |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 | 0 | 0 | (0.01)
Net investment income |  |  |  |  |  |  |  |  |  |  |  | 1.43 | 1.61 | 1.59 | 1.99 | 1.87
Net realized and unrealized gain (loss) |  |  |  |  |  |  |  |  |  |  |  | (0.16) | (1.09) | (0.82) | (0.4) | 0
Incentive allocation reserve and distributions |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (0.4) | (0.37)
Total from investment operations |  |  |  |  |  |  |  |  |  |  |  | 1.27 | 0.52 | 0.77 | 1.19 | 1.5
Issuance of common stock |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 | 0 | 0.14 | 0.01
Repurchase of common stock |  |  |  |  |  |  |  |  |  |  |  | 0.12 | 0 | 0 | 0 | 0
Issuance of convertible debt |  |  |  |  |  |  |  |  |  |  |  | 0 | 0 | 0 | 0 | 0.06
Loss on extinguishment of debt |  |  |  |  |  |  |  |  |  |  |  | (0.04) | 0 | 0 | 0 | 0
Ordinary income dividends |  |  |  |  |  |  |  |  |  |  |  | (1.13) | (1.44) | (1.44) | (1.44) | (1.44)
Tax basis returns of capital |  |  |  |  |  |  |  |  |  |  |  | (0.19) | 0 | 0 | 0 | 0
Dividends to common shareholders |  |  |  |  |  |  |  |  |  |  |  | (1.32) | (1.44) | (1.44) | (1.44) | (1.44)
Per share NAV at end of period |  |  |  |  |  |  |  |  |  |  |  | 13.24 | 13.21 | 14.13 | 14.8 | 14.91
Per share market price at end of period |  |  |  |  |  |  |  |  |  |  |  | $ 11.24 | $ 14.05 | $ 13.04 | $ 15.28 | $ 16.9
Total return based on market value |  |  |  |  |  |  |  |  |  |  |  | (10.60%) | 18.80% | (5.20%) | (1.10%) | 31.70%
Total return based on net asset value |  |  |  |  |  |  |  |  |  |  |  | 10.20% | 3.70% | 5.20% | 8.90% | 10.60%
Shares outstanding at end of period |  |  |  |  |  |  |  |  |  |  |  | 57,767,264 | 58,766,426 | 58,774,607 | 58,847,256 | 53,041,900
Net investment income | [8],[9] |  |  |  |  |  |  |  |  |  |  | 11.30% | 11.60% | 10.80% | 10.60% | 10.10%
Expenses before incentive fee | [8],[10] |  |  |  |  |  |  |  |  |  |  | 10.00% | 9.80% | 8.50% | 7.30% | 6.90%
Expenses and incentive fee | [8],[11] |  |  |  |  |  |  |  |  |  |  | 12.10% | 12.30% | 11.20% | 9.90% | 9.40%
Ending common shareholder equity |  |  |  |  |  |  |  |  |  |  |  | $ 764,986,578 | $ 776,318,386 | $ 830,474,727 | $ 870,728,126 | $ 790,935,991
Portfolio turnover rate |  |  |  |  |  |  |  |  |  |  |  | 28.30% | 35.90% | 32.30% | 45.90% | 37.90%
Weighted-average debt outstanding | [12] |  |  |  |  |  |  |  |  |  |  | $ 936,157,021 | $ 902,977,493 | $ 769,065,775 | $ 623,666,655 | $ 542,421,190
Weighted-average interest rate on debt | [13] |  |  |  |  |  |  |  |  |  |  | 3.90% | 4.60% | 4.60% | 4.50% | 3.90%
Weighted-average number of common shares |  |  |  |  |  |  |  |  |  |  |  | 57,991,233 | 58,766,362 | 58,815,216 | 57,000,658 | 50,948,035
Weighted Average Debt Per Share | [12] |  |  |  |  |  |  |  |  |  |  | $ 16.14 | $ 15.37 | $ 13.08 | $ 10.94 | $ 10.65
Asset Coverage: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt outstanding | [14] |  |  |  |  |  |  |  |  |  |  | $ 856,324,371 | $ 915,514,071 | $ 812,007,389 | $ 733,824,353 | $ 579,906,288
Asset coverage per $1,000 of debt outstanding |  |  |  |  |  |  |  |  |  |  |  | $ 2,058 | $ 1,992 | $ 2,157 | $ 2,335 | $ 2,344
[1] | Amounts shown reflect the impact of the purchase discount recorded in connection with the Merger and were computed based on the actual amounts earned or incurred by the Company divided by the actual shares outstanding in the respective accounting periods before and after the closing of the Merger on March 18, 2024.
[2] | Dividends to common shareholders include a tax return of capital of $0 ($0.00 per share), $0 ($0.00 per share), $0 ($0.00 per share), $0 ($0.00 per share) and $0 ($0.00 per share) for the years ended December 31, 2025, 2024, 2023, 2022 and 2021, respectively.
[3] | Total return based on market value is calculated as the change in ending market value per share during the period plus declared dividends per share during the period, divided by the market value per share at the beginning of the period.
[4] | Total return based on net asset value is calculated as the change in net asset value per share during the period plus declared dividends per share during the period, divided by the net asset value per share at the beginning of the period.
[5] | Net of incentive compensation and excise taxes.
[6] | Excludes unamortized debt issuance costs which are netted in the Consolidated Statements of Assets and Liabilities.
[7] | Excludes SBA Debentures.
[8] | (1) These ratios include interest expense but do not reflect the effect of dividends on the preferred equity facility.
[9] | (2) Net of incentive allocation and excise taxes.
[10] | (3) Includes interest and other debt costs but excludes excise taxes and incentive compensation.
[11] | (4) Includes incentive compensation and all Company expenses including interest and other debt costs.
[12] | (5) Includes both debt and preferred equity leverage.
[13] | (6) Includes dividends on the preferred equity leverage facility.
[14] | (7) Excludes unamortized debt issuance costs which are netted in the Consolidated Statements of Assets and Liabilities.

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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)(a)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 + Details
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