v3.26.1
Fair Value Measurements - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Fair Value Measurement Inputs and Valuation Techniques [Line Items]        
Net change in unrealized appreciation (depreciation) on investment transactions $ 198 $ 709 $ (36,001) $ 3,762
Level 3        
Fair Value Measurement Inputs and Valuation Techniques [Line Items]        
Net change in unrealized appreciation (depreciation) on investment transactions $ (481) $ 19,418 $ (34,997) $ 23,207