Leases (Lease-Related Supplemental Cash Flow Information) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Leases [Abstract]
Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows for operating leases	$ 5,375	$ 5,151	$ 5,303
Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows for finance leases	138	157	51
Cash paid for amounts included in the measurement of lease liabilities: Financing cash flows for finance leases	818	779	796
Right-of-use assets obtained in exchange for recorded lease obligations: Operating leases	$ 6,117	2,230	14,678
Right-of-use assets obtained in exchange for recorded lease obligations: Finance leases		$ 48	$ 4,046