Leases - Lease Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Sep. 30, 2024
Assets
Operating lease right-of-use assets	$ 26,213	$ 29,580
Finance lease, right-of-use asset	6,946	9,881
Lease Assets	$ 33,159	$ 39,461
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	$ 9,615	$ 11,555
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Other accrued liabilities	Other accrued liabilities
Finance lease liabilities, current	$ 3,266	$ 3,144
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Other accrued liabilities	Other accrued liabilities
Operating lease liabilities	$ 19,187	$ 21,963
Finance lease liabilities, non-current	$ 3,941	$ 7,263
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other liabilities	Other liabilities
Total lease liabilities	$ 36,009	$ 43,925
Accumulated depreciation	$ 4,800	$ 1,900