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)