v3.26.3
Income Taxes - Schedule of Reconciliation of Net Increase in Net Assets Resulting from Operations to Taxable Income (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Aug. 31, 2026
Aug. 31, 2025
Aug. 31, 2024
Income Tax Disclosure [Abstract]          
Net Increase (Decrease) in Net Assets Resulting from Operations $ (21,555) $ 77,981 $ 131,871 $ (490,501) $ 234,119
Net realized (gains) losses on investments     241,579 539,089 434,238
Net unrealized (gains) losses on investments     (46,063) 289,399 (259,971)
Other temporary book-to-tax differences     (79,647) (42,450) (81,794)
Permanent differences     55 96 62
Taxable income before deductions for distributions     $ 247,795 $ 295,633 $ 326,654