v3.25.4

Taxes and Distributions - Summary of Components of Undistributed Taxable Income on Tax Basis and Reconciliation to Accumulated Deficit on Book basis (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2023
--- | --- | --- | ---
Income Tax Disclosure [Abstract] |  |  |
Undistributed net investment income – tax basis | $ 45,948 | $ 65,962 | $ 62,710
Short-term realized loss carried forward | (6,164) | (3,397) | (1,699)
Long-term realized loss carried forward | (336,619) | (287,545) | (379,074)
Distributions payable and other book to tax differences | (31,184) | (37,435) | 83,860
Net unrealized appreciation (depreciation) on investments and debt | 51,398 | 12,290 | (10,141)
Total accumulated deficit – book basis | $ (276,621) | $ (250,125) | $ (244,344)

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