Revenue from Contracts with Customers - Schedule of Contract Liability (Details) - USD ($) $ in Thousands |
9 Months Ended | |
|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Nonrelated Party | ||
| Contract With Customer, Liability [Roll Forward] | ||
| Deferred revenue, beginning of period | $ 640,457 | $ 274,499 |
| Additions | 740,192 | 487,626 |
| Revenue recognized related to amounts that were included in beginning balance of deferred revenue | (424,158) | (216,903) |
| Deferred revenue end of period | 956,491 | 545,222 |
| Related Party | ||
| Contract With Customer, Liability [Roll Forward] | ||
| Deferred revenue, beginning of period | 79,916 | 38,162 |
| Additions | 21,167 | 37,899 |
| Revenue recognized related to amounts that were included in beginning balance of deferred revenue | (43,552) | (28,271) |
| Deferred revenue end of period | $ 57,531 | $ 47,790 |