Taxable/Distributable Income - Schedule of Reconciliation of Net Increase (Decrease) in Net Assets Resulting from Operations (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Income Tax Disclosure [Abstract]
Net increase (decrease) in net assets resulting from operations	$ 77,018	$ 76,780
Net unrealized (appreciation) depreciation	32,141	(963)
Book/tax difference due to capital gains incentive fees	0	657
Other book/tax differences	(6,397)	30,358
Taxable income	$ 102,762	$ 106,832