Leases (Lease-Related Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Sep. 30, 2024
Assets:
Operating lease assets	$ 23,218	$ 27,135
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other Assets, Noncurrent	Other Assets, Noncurrent
Finance lease assets	$ 3,341	$ 2,516
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Property, Plant and Equipment, Net	Property, Plant and Equipment, Net
Total lease assets	$ 26,559	$ 29,651
Current liabilities:
Operating lease liabilities	$ 4,564	$ 5,029
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Accrued Liabilities, Current	Accrued Liabilities, Current
Finance lease liabilities	$ 975	$ 719
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Long-Term Debt, Current Maturities	Long-Term Debt, Current Maturities
Noncurrent liabilities:
Operating lease liabilities	$ 19,129	$ 22,670
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other Liabilities, Noncurrent	Other Liabilities, Noncurrent
Finance lease liabilities	$ 2,592	$ 2,017
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Long-Term Debt, Excluding Current Maturities	Long-Term Debt, Excluding Current Maturities
Total lease liabilities	$ 27,260	$ 30,435