Leases - Schedule of Lessee Assets and Liabilities (Details) - USD ($) $ in Thousands |
Jun. 30, 2026 |
Sep. 30, 2025 |
Jun. 30, 2025 |
|---|---|---|---|
| Lease assets: | |||
| Operating lease right-of-use assets | $ 281,159 | $ 236,462 | $ 236,064 |
| Financing lease assets | $ 991 | $ 1,075 | $ 1,210 |
| Finance Lease, Other Assets, Statement of Financial Position [Extensible Enumeration] | Other Assets, Noncurrent | Other Assets, Noncurrent | Other Assets, Noncurrent |
| Total lease assets | $ 282,150 | $ 237,537 | $ 237,274 |
| Current: | |||
| Operating lease liabilities | 69,755 | 61,228 | 60,183 |
| Financing lease liabilities | $ 701 | $ 643 | $ 657 |
| Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] | Accounts payable, accrued expenses and other current liabilities | Accounts payable, accrued expenses and other current liabilities | Accounts payable, accrued expenses and other current liabilities |
| Total current lease liabilities | $ 70,456 | $ 61,871 | $ 60,840 |
| Non-current: | |||
| Operating lease liabilities | 221,499 | 184,736 | 184,295 |
| Financing lease liabilities | $ 407 | $ 573 | $ 695 |
| Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] | Other Liabilities, Noncurrent | Other Liabilities, Noncurrent | Other Liabilities, Noncurrent |
| Total non-current lease liabilities | $ 221,906 | $ 185,309 | $ 184,990 |
| Total lease liabilities | $ 292,362 | $ 247,180 | $ 245,830 |