Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Sep. 30, 2021
Finance Leases
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Premises, Furniture and Equipment, Net	Premises, Furniture and Equipment, Net
Premises, Furniture and Equipment, Net	$ 1,910	$ 2,120
Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Other Borrowings	Other Borrowings
Other Borrowings	$ 2,908	$ 3,096
Operating Leases
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Accrued Interest Receivable and Other Assets	Accrued Interest Receivable and Other Assets
Operating Lease Right-of-Use Assets	$ 6,195	$ 6,241
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Accrued Interest Payable and Other Liabilities	Accrued Interest Payable and Other Liabilities
Operating Lease Liabilities	$ 6,338	$ 6,344