v3.25.3

N-2 - USD ($) $ / shares in Units, $ in Thousands | 9 Months Ended | 12 Months Ended |  |  |  |  |  |  |  |  |
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Sep. 30, 2025 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2024 | Sep. 30, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Cover [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Entity Central Index Key |  | 0001418076 |  |  |  |  |  |  |  |  |  |  |
Amendment Flag |  | false |  |  |  |  |  |  |  |  |  |  |
Securities Act File Number |  | 814-00754 |  |  |  |  |  |  |  |  |  |  |
Document Type |  | 10-Q |  |  |  |  |  |  |  |  |  |  |
Entity Registrant Name |  | SLR INVESTMENT CORP. |  |  |  |  |  |  |  |  |  |  |
Entity Address, Address Line One |  | 500 Park Avenue |  |  |  |  |  |  |  |  |  |  |
Entity Address, City or Town |  | New York |  |  |  |  |  |  |  |  |  |  |
Entity Address, State or Province |  | NY |  |  |  |  |  |  |  |  |  |  |
Entity Address, Postal Zip Code |  | 10022 |  |  |  |  |  |  |  |  |  |  |
City Area Code |  | 212 |  |  |  |  |  |  |  |  |  |  |
Local Phone Number |  | 993-1670 |  |  |  |  |  |  |  |  |  |  |
Entity Emerging Growth Company |  | false |  |  |  |  |  |  |  |  |  |  |
Financial Highlights [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Senior Securities Amount | [1] | $ 1,147,436 | $ 390,200 | $ 432,900 | $ 1,041,093 |  | $ 1,183,250 | $ 1,093,200 | $ 818,500 | $ 677,000 | $ 593,900 | $ 476,185 | $ 541,600
Senior Securities Coverage per Unit | [2] | $ 1,866 | $ 3,354 | $ 3,039 | $ 1,954 |  | $ 1,834 | $ 1,915 | $ 2,029 | $ 2,259 | $ 2,525 | $ 2,930 | $ 2,702
Preferred Stock Liquidating Preference | [3] | $ 0 | $ 0 | $ 0 | 0 |  | 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0
Senior Securities, Note [Text Block] |  | Senior Securities Information about our senior securities is shown in the following table (in thousands) as of the quarter ended September 30, 2025 and each year ended December 31 for the past ten years, unless otherwise noted. The “—” indicates information which the SEC expressly does not require to be disclosed for certain types of senior securities.
Class and Year |  | Total Amount Outstanding(1) |  |  | Asset Coverage Per Unit(2) |  |  | Involuntary Liquidating Preference Per Unit(3) |  |  | Average Market Value Per Unit(4)
Credit Facility |  |  |  |  |  |  |  |  |  |  |
Fiscal 2025 (through September 30, 2025) |  | $ | 358,386 |  |  | $ | 583 |  |  |  | — |  |  | N/A
Fiscal 2024 |  |  | 342,043 |  |  |  | 642 |  |  |  | — |  |  | N/A
Fiscal 2023 |  |  | 407,000 |  |  |  | 631 |  |  |  | — |  |  | N/A
Fiscal 2022 |  |  | 293,000 |  |  |  | 513 |  |  |  | — |  |  | N/A
Fiscal 2021 |  |  | 222,500 |  |  |  | 552 |  |  |  | — |  |  | N/A
Fiscal 2020 |  |  | 126,000 |  |  |  | 421 |  |  |  | — |  |  | N/A
Fiscal 2019 |  |  | 42,900 |  |  |  | 182 |  |  |  | — |  |  | N/A
Fiscal 2018 |  |  | 96,400 |  |  |  | 593 |  |  |  | — |  |  | N/A
Fiscal 2017 |  |  | 245,600 |  |  |  | 1,225 |  |  |  | — |  |  | N/A
Fiscal 2016 |  |  | 115,200 |  |  |  | 990 |  |  |  | — |  |  | N/A
Fiscal 2015 |  |  | 207,900 |  |  |  | 1,459 |  |  |  | — |  |  | N/A
SPV Credit Facility |  |  |  |  |  |  |  |  |  |  |
Fiscal 2025 (through September 30, 2025) |  |  | 165,050 |  |  |  | 268 |  |  |  | — |  |  | N/A
Fiscal 2024 |  |  | 165,050 |  |  |  | 310 |  |  |  | — |  |  | N/A
Fiscal 2023 |  |  | 206,250 |  |  |  | 320 |  |  |  | — |  |  | N/A
Fiscal 2022 |  |  | 155,200 |  |  |  | 272 |  |  |  | — |  |  | N/A
2022 Unsecured Notes |  |  |  |  |  |  |  |  |  |  |
Fiscal 2022 |  |  | — |  |  |  | — |  |  |  | — |  |  | N/A
Fiscal 2021 |  |  | 150,000 |  |  |  | 372 |  |  |  | — |  |  | N/A
Fiscal 2020 |  |  | 150,000 |  |  |  | 501 |  |  |  | — |  |  | N/A
Fiscal 2019 |  |  | 150,000 |  |  |  | 638 |  |  |  | — |  |  | N/A
Fiscal 2018 |  |  | 150,000 |  |  |  | 923 |  |  |  | — |  |  | N/A
Fiscal 2017 |  |  | 150,000 |  |  |  | 748 |  |  |  | — |  |  | N/A
Fiscal 2016 |  |  | 50,000 |  |  |  | 430 |  |  |  | — |  |  | N/A
2022 Tranche C Notes |  |  |  |  |  |  |  |  |  |  |
Fiscal 2022 |  |  | — |  |  |  | — |  |  |  | — |  |  | N/A
Fiscal 2021 |  |  | 21,000 |  |  |  | 52 |  |  |  | — |  |  | N/A
Fiscal 2020 |  |  | 21,000 |  |  |  | 70 |  |  |  | — |  |  | N/A
Fiscal 2019 |  |  | 21,000 |  |  |  | 89 |  |  |  | — |  |  | N/A
Fiscal 2018 |  |  | 21,000 |  |  |  | 129 |  |  |  | — |  |  | N/A
Fiscal 2017 |  |  | 21,000 |  |  |  | 105 |  |  |  | — |  |  | N/A
2023 Unsecured Notes |  |  |  |  |  |  |  |  |  |  |
Fiscal 2023 |  |  | — |  |  |  | — |  |  |  | — |  |  | N/A
Fiscal 2022 |  |  | 75,000 |  |  |  | 131 |  |  |  | — |  |  | N/A
Fiscal 2021 |  |  | 75,000 |  |  |  | 186 |  |  |  | — |  |  | N/A
Fiscal 2020 |  |  | 75,000 |  |  |  | 250 |  |  |  | — |  |  | N/A
Fiscal 2019 |  |  | 75,000 |  |  |  | 319 |  |  |  | — |  |  | N/A
Fiscal 2018 |  |  | 75,000 |  |  |  | 461 |  |  |  | — |  |  | N/A
Fiscal 2017 |  |  | 75,000 |  |  |  | 374 |  |  |  | — |  |  | N/A
2024 Unsecured Notes |  |  |  |  |  |  |  |  |  |  |
Fiscal 2024 |  |  | — |  |  |  | — |  |  |  | — |  |  | N/A
Fiscal 2023 |  |  | 125,000 |  |  |  | 194 |  |  |  | — |  |  | N/A
Fiscal 2022 |  |  | 125,000 |  |  |  | 219 |  |  |  | — |  |  | N/A
Fiscal 2021 |  |  | 125,000 |  |  |  | 309 |  |  |  | — |  |  | N/A
Fiscal 2020 |  |  | 125,000 |  |  |  | 417 |  |  |  | — |  |  | N/A
Fiscal 2019 |  |  | 125,000 |  |  |  | 531 |  |  |  | — |  |  | N/A
2025 Unsecured Notes |  |  |  |  |  |  |  |  |  |  |
Fiscal 2025 (through September 30, 2025) |  |  | — |  |  |  | — |  |  |  | — |  |  | N/A
Fiscal 2024 |  |  | 85,000 |  |  |  | 159 |  |  |  | — |  |  | N/A
Fiscal 2023 |  |  | 85,000 |  |  |  | 132 |  |  |  | — |  |  | N/A
Fiscal 2022 |  |  | 85,000 |  |  |  | 149 |  |  |  | — |  |  | N/A
Class and Year |  | Total Amount Outstanding(1) |  |  | Asset Coverage Per Unit(2) |  |  | Involuntary Liquidating Preference Per Unit(3) |  |  | Average Market Value Per Unit(4) |
2026 Unsecured Notes |  |  |  |  |  |  |  |  |  |  |  |
Fiscal 2025 (through September 30, 2025) |  | $ | 75,000 |  |  | $ | 122 |  |  |  | — |  |  | N/A |
Fiscal 2024 |  |  | 75,000 |  |  |  | 141 |  |  |  | — |  |  | N/A |
Fiscal 2023 |  |  | 75,000 |  |  |  | 116 |  |  |  | — |  |  | N/A |
Fiscal 2022 |  |  | 75,000 |  |  |  | 131 |  |  |  | — |  |  | N/A |
Fiscal 2021 |  |  | 75,000 |  |  |  | 186 |  |  |  | — |  |  | N/A |
Fiscal 2020 |  |  | 75,000 |  |  |  | 250 |  |  |  | — |  |  | N/A |
Fiscal 2019 |  |  | 75,000 |  |  |  | 319 |  |  |  | — |  |  | N/A |
2027 Unsecured Notes |  |  |  |  |  |  |  |  |  |  |  |
Fiscal 2025 (through September 30, 2025) |  |  | 50,000 |  |  |  | 81 |  |  |  | — |  |  | N/A |
Fiscal 2024 |  |  | 50,000 |  |  |  | 94 |  |  |  | — |  |  | N/A |
Fiscal 2023 |  |  | 50,000 |  |  |  | 77 |  |  |  | — |  |  | N/A |
Fiscal 2022 |  |  | 50,000 |  |  |  | 88 |  |  |  | — |  |  | N/A |
Fiscal 2021 |  |  | 50,000 |  |  |  | 124 |  |  |  | — |  |  | N/A |
2027 Series F Unsecured Notes |  |  |  |  |  |  |  |  |  |  |  |
Fiscal 2025 (through September 30, 2025) |  |  | 135,000 |  |  |  | 220 |  |  |  | — |  |  | N/A |
Fiscal 2024 |  |  | 135,000 |  |  |  | 253 |  |  |  | — |  |  | N/A |
Fiscal 2023 |  |  | 135,000 |  |  |  | 209 |  |  |  | — |  |  | N/A |
Fiscal 2022 |  |  | 135,000 |  |  |  | 237 |  |  |  | — |  |  | N/A |
2027 Series G Unsecured Notes |  |  |  |  |  |  |  |  |  |  |  |
Fiscal 2025 (through September 30, 2025) |  |  | 49,000 |  |  |  | 80 |  |  |  | — |  |  | N/A |
Fiscal 2024 |  |  | 49,000 |  |  |  | 92 |  |  |  | — |  |  | N/A |
2028 Series H Unsecured Notes |  |  |  |  |  |  |  |  |  |  |  |
Fiscal 2025 (through September 30, 2025) |  |  | 50,000 |  |  |  | 81 |  |  |  | — |  |  | N/A |
2028 Series I Unsecured Notes |  |  |  |  |  |  |  |  |  |  |  |
Fiscal 2025 (through September 30, 2025) |  |  | 50,000 |  |  |  | 81 |  |  |  | — |  |  | N/A |
2028 Series J Unsecured Notes |  |  |  |  |  |  |  |  |  |  |  |
Fiscal 2025 (through September 30, 2025) |  |  | 75,000 |  |  |  | 122 |  |  |  | — |  |  | N/A |
2042 Unsecured Notes |  |  |  |  |  |  |  |  |  |  |  |
Fiscal 2017 |  |  | — |  |  |  | — |  |  |  | — |  |  | N/A |
Fiscal 2016 |  |  | 100,000 |  |  |  | 859 |  |  |  | — |  |  | $ | 1,002 |
Fiscal 2015 |  |  | 100,000 |  |  |  | 702 |  |  |  | — |  |  |  | 982 |
Senior Secured Notes |  |  |  |  |  |  |  |  |  |  |  |
Fiscal 2017 |  |  | — |  |  |  | — |  |  |  | — |  |  | N/A |
Fiscal 2016 |  |  | 75,000 |  |  |  | 645 |  |  |  | — |  |  | N/A |
Fiscal 2015 |  |  | 75,000 |  |  |  | 527 |  |  |  | — |  |  | N/A |
Term Loans |  |  |  |  |  |  |  |  |  |  |  |
Fiscal 2025 (through September 30, 2025) |  |  | 140,000 |  |  |  | 228 |  |  |  | — |  |  | N/A |
Fiscal 2024 |  |  | 140,000 |  |  |  | 263 |  |  |  | — |  |  | N/A |
Fiscal 2023 |  |  | 100,000 |  |  |  | 155 |  |  |  | — |  |  | N/A |
Fiscal 2022 |  |  | 100,000 |  |  |  | 175 |  |  |  | — |  |  | N/A |
Fiscal 2021 |  |  | 100,000 |  |  |  | 248 |  |  |  | — |  |  | N/A |
Fiscal 2020 |  |  | 75,000 |  |  |  | 250 |  |  |  | — |  |  | N/A |
Fiscal 2019 |  |  | 75,000 |  |  |  | 319 |  |  |  | — |  |  | N/A |
Fiscal 2018 |  |  | 50,000 |  |  |  | 308 |  |  |  | — |  |  | N/A |
Fiscal 2017 |  |  | 50,000 |  |  |  | 250 |  |  |  | — |  |  | N/A |
Fiscal 2016 |  |  | 50,000 |  |  |  | 430 |  |  |  | — |  |  | N/A |
Fiscal 2015 |  |  | 50,000 |  |  |  | 351 |  |  |  | — |  |  | N/A |
NEFPASS Facility |  |  |  |  |  |  |  |  |  |  |  |
Fiscal 2021 |  |  | — |  |  |  | — |  |  |  | — |  |  | N/A |
Fiscal 2020 |  |  | 30,000 |  |  |  | 100 |  |  |  | — |  |  | N/A |
Fiscal 2019 |  |  | 30,000 |  |  |  | 128 |  |  |  | — |  |  | N/A |
Fiscal 2018 |  |  | 30,000 |  |  |  | 185 |  |  |  | — |  |  | N/A |
SSLP Facility |  |  |  |  |  |  |  |  |  |  |  |
Fiscal 2019 |  |  | — |  |  |  | — |  |  |  | — |  |  | N/A |
Fiscal 2018 |  |  | 53,785 |  |  |  | 331 |  |  |  | — |  |  | N/A |
Total Senior Securities |  |  |  |  |  |  |  |  |  |  |  |
Fiscal 2025 (through September 30, 2025) |  | $ | 1,147,436 |  |  | $ | 1,866 |  |  |  | — |  |  | N/A |
Fiscal 2024 |  |  | 1,041,093 |  |  |  | 1,954 |  |  |  | — |  |  | N/A |
Fiscal 2023 |  |  | 1,183,250 |  |  |  | 1,834 |  |  |  | — |  |  | N/A |
Fiscal 2022 |  |  | 1,093,200 |  |  |  | 1,915 |  |  |  | — |  |  | N/A |
Fiscal 2021 |  |  | 818,500 |  |  |  | 2,029 |  |  |  | — |  |  | N/A |
Fiscal 2020 |  |  | 677,000 |  |  |  | 2,259 |  |  |  | — |  |  | N/A |
Fiscal 2019 |  |  | 593,900 |  |  |  | 2,525 |  |  |  | — |  |  | N/A |
Fiscal 2018 |  |  | 476,185 |  |  |  | 2,930 |  |  |  | — |  |  | N/A |
Fiscal 2017 |  |  | 541,600 |  |  |  | 2,702 |  |  |  | — |  |  | N/A |
Fiscal 2016 |  |  | 390,200 |  |  |  | 3,354 |  |  |  | — |  |  | N/A |
Fiscal 2015 |  |  | 432,900 |  |  |  | 3,039 |  |  |  | — |  |  | N/A |
(1) Total amount of each class of senior securities outstanding (in thousands) at the end of the period presented. (2) The asset coverage ratio for a class of senior securities representing indebtedness is calculated as our consolidated total assets, less all liabilities and indebtedness not represented by senior securities, divided by all senior securities representing indebtedness. This asset coverage ratio is multiplied by one thousand to determine the Asset Coverage Per Unit. In order to determine the specific Asset Coverage Per Unit for each class of debt, the total Asset Coverage Per Unit is allocated based on the amount outstanding in each class of debt at the end of the period. As of September 30, 2025, asset coverage was 186.6%. (3) The amount to which such class of senior security would be entitled upon the involuntary liquidation of the issuer in preference to any security junior to it. (4) Not applicable except for the 2042 Unsecured Notes which were publicly traded. The Average Market Value Per Unit is calculated by taking the daily average closing price during the period and dividing it by twenty-five dollars per share and multiplying the result by one thousand to determine a unit price per thousand consistent with Asset Coverage Per Unit. The average market value for the fiscal 2016 and 2015 periods was $100,175 and $98,196, respectively. |  |  |  |  |  |  |  |  |  |  |
General Description of Registrant [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Investment Objectives and Practices [Text Block] |  | Portfolio and Investment Activity During the three months ended September 30, 2025, we invested approximately $276.9 million across 33 portfolio companies. This compares to investing approximately $157.1 million in 25 portfolio companies during the three months ended September 30, 2024. Investments sold, prepaid or repaid during the three months ended September 30, 2025 totaled approximately $311.9 million versus approximately $223.5 million for the three months ended September 30, 2024. At September 30, 2025, our portfolio consisted of 109 portfolio companies and was invested 22.9% in cash flow senior secured loans, 46.2% in asset-based senior secured loans / SLR Credit Solutions (“SLR Credit”) / SLR Healthcare ABL / SLR Business Credit, 18.7% in equipment senior secured financings / SLR Equipment Finance (“SLR Equipment”) / Kingsbridge Holdings, LLC (“KBH”) and 12.2% in life science investments, in each case, measured at fair value, versus 131 portfolio companies invested 33.0% in cash flow senior secured loans, 32.6% in asset-based senior secured loans / SLR Credit / SLR Healthcare ABL / SLR Business Credit, 21.5% in equipment senior secured financings / SLR Equipment / KBH, and 12.9% in life science investments, in each case, measured at fair value, at September 30, 2024. At September 30, 2025, 83.4%, or $1.74 billion, of our income producing investment portfolio* was floating rate and 16.6%, or $344.7 million, was fixed rate, measured at fair value. At September 30, 2024, 80.8%, or $1.66 billion, of our income producing investment portfolio* was floating rate and 19.2%, or $393.8 million, was fixed rate, measured at fair value. As of September 30, 2025 and 2024, we had one and one issuers, respectively, on non-accrual status. * We have included SLR Credit Solutions, SLR Equipment Finance, SLR Healthcare ABL, SLR Business Credit and Kingsbridge Holdings, LLC within our income producing investment portfolio. |  |  |  |  |  |  |  |  |  |  |
Risk Factors [Table Text Block] |  | Item 1A. Ris k Factors In addition to the other information set forth in this report, you should carefully consider the factors discussed in “Risk Factors” in the February 25, 2025 filing of our Annual Report on Form 10-K (the “Annual Report”) , which could materially affect our business, financial condition and/or operating results. The risks described in our Annual Report are not the only risks facing our Company. Additional risks and uncertainties not currently known to us or that we currently deem to be immaterial also may materially and adversely affect our business, financial condition and/or operating results. There have been no material changes during the period ended September 30, 2025 to the risk factors discussed in “Risk Factors” in the February 25, 2025 filing of our Annual Report on Form 10-K. |  |  |  |  |  |  |  |  |  |  |
NAV Per Share |  | $ 18.21 |  |  | $ 18.2 | $ 18.2 | $ 18.09 |  |  |  |  |  |
Credit Facility [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Financial Highlights [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Senior Securities Amount | [1] | $ 358,386 | $ 115,200 | $ 207,900 | $ 342,043 |  | $ 407,000 | $ 293,000 | $ 222,500 | $ 126,000 | $ 42,900 | $ 96,400 | $ 245,600
Senior Securities Coverage per Unit | [2] | $ 583 | $ 990 | $ 1,459 | $ 642 |  | $ 631 | $ 513 | $ 552 | $ 421 | $ 182 | $ 593 | $ 1,225
Preferred Stock Liquidating Preference | [3] | $ 0 | $ 0 | $ 0 | $ 0 |  | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0
SPV Credit Facility [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Financial Highlights [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Senior Securities Amount | [1] | $ 165,050 |  |  | $ 165,050 |  | $ 206,250 | $ 155,200 |  |  |  |  |
Senior Securities Coverage per Unit | [2] | $ 268 |  |  | $ 310 |  | $ 320 | $ 272 |  |  |  |  |
Preferred Stock Liquidating Preference | [3] | $ 0 |  |  | $ 0 |  | $ 0 | $ 0 |  |  |  |  |
2022 Unsecured Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Financial Highlights [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Senior Securities Amount | [1] |  | $ 50,000 |  |  |  |  | $ 0 | $ 150,000 | $ 150,000 | $ 150,000 | $ 150,000 | $ 150,000
Senior Securities Coverage per Unit | [2] |  | $ 430 |  |  |  |  | $ 0 | $ 372 | $ 501 | $ 638 | $ 923 | $ 748
Preferred Stock Liquidating Preference | [3] |  | $ 0 |  |  |  |  | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0
2022 Tranche C Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Financial Highlights [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Senior Securities Amount | [1] |  |  |  |  |  |  | $ 0 | $ 21,000 | $ 21,000 | $ 21,000 | $ 21,000 | $ 21,000
Senior Securities Coverage per Unit | [2] |  |  |  |  |  |  | $ 0 | $ 52 | $ 70 | $ 89 | $ 129 | $ 105
Preferred Stock Liquidating Preference | [3] |  |  |  |  |  |  | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0
2023 Unsecured Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Financial Highlights [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Senior Securities Amount | [1] |  |  |  |  |  | $ 0 | $ 75,000 | $ 75,000 | $ 75,000 | $ 75,000 | $ 75,000 | $ 75,000
Senior Securities Coverage per Unit | [2] |  |  |  |  |  | $ 0 | $ 131 | $ 186 | $ 250 | $ 319 | $ 461 | $ 374
Preferred Stock Liquidating Preference | [3] |  |  |  |  |  | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0
2024 Unsecured Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Financial Highlights [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Senior Securities Amount | [1] |  |  |  | $ 0 |  | $ 125,000 | $ 125,000 | $ 125,000 | $ 125,000 | $ 125,000 |  |
Senior Securities Coverage per Unit | [2] |  |  |  | $ 0 |  | $ 194 | $ 219 | $ 309 | $ 417 | $ 531 |  |
Preferred Stock Liquidating Preference | [3] |  |  |  | $ 0 |  | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 |  |
2025 Unsecured Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Financial Highlights [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Senior Securities Amount | [1] | $ 0 |  |  | $ 85,000 |  | $ 85,000 | $ 85,000 |  |  |  |  |
Senior Securities Coverage per Unit | [2] | $ 0 |  |  | $ 159 |  | $ 132 | $ 149 |  |  |  |  |
Preferred Stock Liquidating Preference | [3] | $ 0 |  |  | $ 0 |  | $ 0 | $ 0 |  |  |  |  |
2026 Unsecured Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Financial Highlights [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Senior Securities Amount | [1] | $ 75,000 |  |  | $ 75,000 |  | $ 75,000 | $ 75,000 | $ 75,000 | $ 75,000 | $ 75,000 |  |
Senior Securities Coverage per Unit | [2] | $ 122 |  |  | $ 141 |  | $ 116 | $ 131 | $ 186 | $ 250 | $ 319 |  |
Preferred Stock Liquidating Preference | [3] | $ 0 |  |  | $ 0 |  | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 |  |
2027 Unsecured Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Financial Highlights [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Senior Securities Amount | [1] | $ 50,000 |  |  | $ 50,000 |  | $ 50,000 | $ 50,000 | $ 50,000 |  |  |  |
Senior Securities Coverage per Unit | [2] | $ 81 |  |  | $ 94 |  | $ 77 | $ 88 | $ 124 |  |  |  |
Preferred Stock Liquidating Preference | [3] | $ 0 |  |  | $ 0 |  | $ 0 | $ 0 | $ 0 |  |  |  |
2027 Series F Unsecured Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Financial Highlights [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Senior Securities Amount | [1] | $ 135,000 |  |  | $ 135,000 |  | $ 135,000 | $ 135,000 |  |  |  |  |
Senior Securities Coverage per Unit | [2] | $ 220 |  |  | $ 253 |  | $ 209 | $ 237 |  |  |  |  |
Preferred Stock Liquidating Preference | [3] | $ 0 |  |  | $ 0 |  | $ 0 | $ 0 |  |  |  |  |
2027 Series G Unsecured Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Financial Highlights [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Senior Securities Amount | [1] | $ 49,000 |  |  | $ 49,000 |  |  |  |  |  |  |  |
Senior Securities Coverage per Unit | [2] | $ 80 |  |  | $ 92 |  |  |  |  |  |  |  |
Preferred Stock Liquidating Preference | [3] | $ 0 |  |  | $ 0 |  |  |  |  |  |  |  |
2028 Series H Unsecured Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Financial Highlights [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Senior Securities Amount | [1] | $ 50,000 |  |  |  |  |  |  |  |  |  |  |
Senior Securities Coverage per Unit | [2] | $ 81 |  |  |  |  |  |  |  |  |  |  |
Preferred Stock Liquidating Preference | [3] | $ 0 |  |  |  |  |  |  |  |  |  |  |
2028 Series I Unsecured Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Financial Highlights [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Senior Securities Amount | [1] | $ 50,000 |  |  |  |  |  |  |  |  |  |  |
Senior Securities Coverage per Unit | [2] | $ 81 |  |  |  |  |  |  |  |  |  |  |
Preferred Stock Liquidating Preference | [3] | $ 0 |  |  |  |  |  |  |  |  |  |  |
2028 Series J Unsecured Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Financial Highlights [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Senior Securities Amount | [1] | $ 75,000 |  |  |  |  |  |  |  |  |  |  |
Senior Securities Coverage per Unit | [2] | $ 122 |  |  |  |  |  |  |  |  |  |  |
Preferred Stock Liquidating Preference | [3] | $ 0 |  |  |  |  |  |  |  |  |  |  |
2042 Unsecured Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Financial Highlights [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Senior Securities Amount | [1] |  | $ 100,000 | $ 100,000 |  |  |  |  |  |  |  |  | $ 0
Senior Securities Coverage per Unit | [2] |  | $ 859 | $ 702 |  |  |  |  |  |  |  |  | $ 0
Preferred Stock Liquidating Preference | [3] |  | 0 | 0 |  |  |  |  |  |  |  |  | $ 0
Senior Securities Average Market Value per Unit | [4] |  | $ 1,002 | $ 982 |  |  |  |  |  |  |  |  |
Senior Secured Notes [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Financial Highlights [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Senior Securities Amount | [1] |  | $ 75,000 | $ 75,000 |  |  |  |  |  |  |  |  | $ 0
Senior Securities Coverage per Unit | [2] |  | $ 645 | $ 527 |  |  |  |  |  |  |  |  | $ 0
Preferred Stock Liquidating Preference | [3] |  | $ 0 | $ 0 |  |  |  |  |  |  |  |  | $ 0
Term Loans [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Financial Highlights [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Senior Securities Amount | [1] | $ 140,000 | $ 50,000 | $ 50,000 | $ 140,000 |  | $ 100,000 | $ 100,000 | $ 100,000 | $ 75,000 | $ 75,000 | $ 50,000 | $ 50,000
Senior Securities Coverage per Unit | [2] | $ 228 | $ 430 | $ 351 | $ 263 |  | $ 155 | $ 175 | $ 248 | $ 250 | $ 319 | $ 308 | $ 250
Preferred Stock Liquidating Preference | [3] | $ 0 | $ 0 | $ 0 | $ 0 |  | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0 | $ 0
NEFPASS Facility [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Financial Highlights [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Senior Securities Amount | [1] |  |  |  |  |  |  |  | $ 0 | $ 30,000 | $ 30,000 | $ 30,000 |
Senior Securities Coverage per Unit | [2] |  |  |  |  |  |  |  | $ 0 | $ 100 | $ 128 | $ 185 |
Preferred Stock Liquidating Preference | [3] |  |  |  |  |  |  |  | $ 0 | $ 0 | $ 0 | $ 0 |
SSLP Facility [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Financial Highlights [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Senior Securities Amount | [1] |  |  |  |  |  |  |  |  |  | $ 0 | $ 53,785 |
Senior Securities Coverage per Unit | [2] |  |  |  |  |  |  |  |  |  | $ 0 | $ 331 |
Preferred Stock Liquidating Preference | [3] |  |  |  |  |  |  |  |  |  | $ 0 | $ 0 |
[1] | Total amount of each class of senior securities outstanding (in thousands) at the end of the period presented.
[2] | The asset coverage ratio for a class of senior securities representing indebtedness is calculated as our consolidated total assets, less all liabilities and indebtedness not represented by senior securities, divided by all senior securities representing indebtedness. This asset coverage ratio is multiplied by one thousand to determine the Asset Coverage Per Unit. In order to determine the specific Asset Coverage Per Unit for each class of debt, the total Asset Coverage Per Unit is allocated based on the amount outstanding in each class of debt at the end of the period. As of September 30, 2025, asset coverage was 186.6%.
[3] | The amount to which such class of senior security would be entitled upon the involuntary liquidation of the issuer in preference to any security junior to it.
[4] | Not applicable except for the 2042 Unsecured Notes which were publicly traded. The Average Market Value Per Unit is calculated by taking the daily average closing price during the period and dividing it by twenty-five dollars per share and multiplying the result by one thousand to determine a unit price per thousand consistent with Asset Coverage Per Unit. The average market value for the fiscal 2016 and 2015 periods was $100,175 and $98,196, respectively.

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