Leases (Balance Sheet Information Related to Operating Leases) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Sep. 30, 2020
Lessee, Lease, Description [Line Items]
Operating Lease Asset	$ 23,601	$ 19,850
Operating Lease Liability - Current	3,963	4,943
Operating Lease Liability - Noncurrent	$ 19,638	$ 14,777
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Deferred Charges	Deferred Charges
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Other Accruals and Current Liabilities	Other Accruals and Current Liabilities
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other Liabilities	Other Liabilities