v3.23.3
Taxable/Distributable Income and Dividend Distributions - Reconciliation of Net Increase (Decrease) in Net Assets Resulting from Operations (Details) - USD ($)
$ in Thousands
 12 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2021
Income Tax Disclosure [Abstract]      
Net increase (decrease) in net assets resulting from operations $ 117,331 $ 29,223 $ 237,260
Net unrealized (appreciation) depreciation 28,555 136,248 (114,519)
Book/tax difference due to organizational costs 0 (87) (87)
Book/tax difference due to capital losses suspended (utilized) 34,607 (16,490) (41,625)
Other book/tax differences (14,691) (6,506) 11,863
Taxable/Distributable Income $ 165,802 $ 142,388 $ 92,892