Leases (Lease-Related Supplemental Cash Flow Information) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Leases [Abstract]
Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows for operating leases	$ 5,303	$ 5,707	$ 5,622
Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows for finance leases	51	58	87
Cash paid for amounts included in the measurement of lease liabilities: Financing cash flows for finance leases	796	1,639	1,590
Right-of-use assets obtained in exchange for recorded lease obligations: Operating leases	14,678	6,871	6,501
Right-of-use assets obtained in exchange for recorded lease obligations: Finance leases	$ 4,046	$ 35	$ 1,244