Taxable/Distributable Income - Schedule of Components of Accumulated Overdistributed Earnings (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Sep. 30, 2025
Income Tax Disclosure [Abstract]
Overdistributed ordinary income, net		$ (60,972)
Net realized capital gains		10,135
Unrealized gains, net		(1,151)
Accumulated overdistributed earnings	$ (209,423)	$ (51,988)

Amount of accumulated undistributed earnings (deficit).

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