Leases (Lease-Related Assets and Liabilities) (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Sep. 30, 2021
Assets:
Operating lease assets	$ 25,144	$ 19,370
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other assets	Other assets
Finance lease assets	$ 5,474	$ 781
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	$ 30,618	$ 20,151
Current liabilities:
Operating lease liabilities	$ 4,587	$ 5,260
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Accrued liabilities	Accrued liabilities
Finance lease liabilities	$ 856	$ 728
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Current portion of long-term debt	Current portion of long-term debt
Noncurrent liabilities:
Operating lease liabilities	$ 21,443	$ 14,770
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other liabilities	Other liabilities
Finance lease liabilities	$ 4,405	$ 475
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Long-term debt, less current portion	Long-term debt, less current portion
Total lease liabilities	$ 31,291	$ 21,233