Commitments and Contingencies - Narrative (Details) - USD ($) $ in Thousands |
Jun. 30, 2025 |
Sep. 30, 2024 |
|---|---|---|
| Financial Support for Nonconsolidated Legal Entity [Line Items] | ||
| Unfunded commitments | $ 305,286 | $ 311,361 |
| Debt and Equity Financing | ||
| Financial Support for Nonconsolidated Legal Entity [Line Items] | ||
| Unfunded commitments | 278,200 | 284,300 |
| Amount which can be drawn immediately | 264,400 | 247,600 |
| JV Financing | ||
| Financial Support for Nonconsolidated Legal Entity [Line Items] | ||
| Unfunded commitments | $ 27,100 | $ 27,100 |