Summary of Significant Accounting Policies - Summary of Contract Liabilities (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Contract With Customer, Liability [Roll Forward] | ||||
| Beginning contract liability | $ 38,406 | $ 49,667 | $ 29,280 | $ 63,955 |
| Revenue recognized from contract liabilities included in the beginning balance | (30,998) | (34,891) | (28,236) | (57,896) |
| Increases due to cash received, net of amounts recognized in revenue during the period | 25,151 | 19,140 | 31,515 | 27,857 |
| Ending contract liability | $ 32,559 | $ 33,916 | $ 32,559 | $ 33,916 |