Operating Leases - Schedule of Lease Expense and Cash Payments & Weighted-Average Remaining Lease Term and Discount Rate (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Leases [Abstract] | ||||
| Operating lease expense | $ 3,428 | $ 1,172 | $ 10,272 | $ 3,481 |
| Cash payments on lease liabilities | $ 2,155 | $ 1,154 | $ 6,244 | $ 3,435 |
| Weighted-average remaining lease term | 5 years 2 months 12 days | 6 years 2 months 12 days | 5 years 2 months 12 days | 6 years 2 months 12 days |
| Weighted-average discount rate | 5.30% | 6.43% | 5.30% | 6.43% |