Leases (Lease-Related Supplemental Cash Flow Information) (Details) - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Leases [Abstract]
Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows for operating leases	$ 2,671	$ 2,701
Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows for finance leases	35	40
Cash paid for amounts included in the measurement of lease liabilities: Financing cash flows for finance leases	835	787
Right-of-use assets obtained in exchange for recorded lease obligations: Operating leases	5,070	5,345
Right-of-use assets obtained in exchange for recorded lease obligations: Finance leases	$ 12	$ 1,244