Premises, Equipment and Leases (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Lessee, Lease, Description [Line Items]
Operating leases, right-of-use asset, amount	$ 8,500	$ 11,300
Operating leases, right-of-use asset, balance sheet location	Other assets	Other assets
Operating leases, lease liability, amount	$ 8,922	$ 11,600
Operating leases, lease liability, balance sheet location	Other liabilities	Other liabilities
Operating leases, weighted average remaining lease term	24 years 1 month 6 days
Operating leases, weighted average discount rate	2.69%
Finance leases, right-of-use asset, amount	$ 1,000
Finance leases, right-of-use asset, balance sheet location	Premises and equipment, net
Finance leases, liability, amount	$ 1,082
Finance leases, lease liability, balance sheet location	Borrowings
Finance leases, weighted average remaining lease term	20 years
Finance leases, weighted average discount rate	5.17%
Finance leases, right-of-use asset, amortization	$ 59
Finance leases, interest expense	53
Finance leases, principal payments	$ 73
Minimum [Member]
Lessee, Lease, Description [Line Items]
Operating leases, remaining term	1 month 6 days
Finance lease, remaining lease term	3 years
Maximum [Member]
Lessee, Lease, Description [Line Items]
Operating leases, remaining term	33 years
Finance lease, remaining lease term	23 years