Summary of Significant Accounting Policies - Summary of Contract Liabilities (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Mar. 31, 2025 |
Mar. 31, 2024 |
Mar. 31, 2025 |
Mar. 31, 2024 |
|
| Contract With Customer, Liability [Roll Forward] | ||||
| Beginning contract liability | $ 53,454 | $ 50,977 | $ 63,955 | $ 51,649 |
| Revenue recognized from contract liabilities included in the beginning balance | (29,732) | (30,078) | (45,780) | (42,049) |
| Increases due to cash received, net of amounts recognized in revenue during the period | 25,945 | 25,637 | 31,492 | 36,936 |
| Ending contract liability | $ 49,667 | $ 46,536 | $ 49,667 | $ 46,536 |