Income Taxes - Summary of Income Tax Contingencies (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Sep. 30, 2025 |
Sep. 30, 2024 |
Sep. 30, 2023 |
|
| Reconciliation of the beginning and ending amount of gross unrecognized tax benefits | |||
| Balance at beginning of year | $ 10,892 | $ 6,233 | $ 8,676 |
| Decreases for lapse of statute of limitations | (300) | 0 | (2,051) |
| Decreases for settlements with taxing authorities | 0 | 0 | (692) |
| Increases for tax positions taken in current year | 500 | 1,100 | 300 |
| Increases for tax positions taken in prior year | 4,841 | 6,148 | 0 |
| Decreases for tax positions taken in prior year | (33) | (2,589) | 0 |
| Balance at end of year | $ 15,900 | $ 10,892 | $ 6,233 |
| X | ||||||||||
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
|
| X | ||||||||||
- Definition Amount of unrecognized tax benefits. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- Definition Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- Definition Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- Definition Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- Definition Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- Definition Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|