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Taxes and Distributions - Summary of Reconciles Net (Decrease) Increase in Net Assets Resulting from Operations to Taxable Income (Details) - USD ($) $ in Thousands | 3 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021
Income Tax Disclosure [Abstract] |  |
Net realized loss on investments | $ (63) | $ (3,138)
Net change in unrealized depreciation (appreciation) on investments and debt | $ 15,415 | $ 1,426

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- Definition Net change in unrealized depreciation appreciation on investments and debt. + References No definition available. + Details
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- Definition Amount of realized gain (loss) on investment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.3(a)) -URI https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 + Details
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