Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Sep. 30, 2024
Finance Leases
Premises, Furniture and Equipment, Net	$ 1,281	$ 1,491
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Premises, Furniture and Equipment, Net	Premises, Furniture and Equipment, Net
Other Borrowings	$ 2,206	$ 2,466
Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Other Borrowings	Other Borrowings
Operating Leases
Operating Lease Right-of-Use Assets	$ 5,582	$ 4,596
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 Liabilities	$ 5,761	$ 4,586
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Accrued Interest Payable and Other Liabilities	Accrued Interest Payable and Other Liabilities