Leases - Lease Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Sep. 30, 2023
Assets
Operating lease, right-of-use asset	$ 29,580	$ 25,703
Finance lease, right-of-use asset	9,881	0
Lease Assets	$ 39,461	$ 25,703
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Property and equipment, net	Property and equipment, net
Liabilities
Operating lease liabilities, Current	$ 11,555	$ 16,336
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Other accrued liabilities	Other accrued liabilities
Finance lease liabilities, Current	$ 3,144	$ 0
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Other accrued liabilities	Other accrued liabilities
Operating lease liabilities, Non-current	$ 21,963	$ 23,903
Finance lease liabilities, Non-current	$ 7,263	$ 0
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other Liabilities, Noncurrent	Other Liabilities, Noncurrent
Operating Lease, Liability, Total	$ 43,925	$ 40,239
Finance Lease, Right-of-Use Asset, Accumulated Amortization	$ 1,900