Commitments and Contingent Liabilities - Commitments Outstanding (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Sep. 30, 2021
Standby Letters of Credit
Loss Contingencies [Line Items]
Variable rate loan commitments amount	$ 817	$ 786
Loan Commitments Outstanding
Loss Contingencies [Line Items]
Fixed rate loan commitments amount	9,992	61,375
Variable rate loan commitments amount	17,184	19,665
Unused Lines of Credit
Loss Contingencies [Line Items]
Variable rate loan commitments amount	$ 45,920	$ 24,639