Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Interest and dividend income
Loans receivable and loans held for sale	$ 51,324	$ 52,539	$ 51,341
Investment securities	3,488	1,195	1,579
Dividends from mutual funds, FHLB stock and other investments	120	111	128
Interest-bearing deposits in banks and CDs	3,576	1,117	2,535
Total interest and dividend income	58,508	54,962	55,583
Interest expense
Deposits	2,657	3,013	4,635
FHLB borrowings	17	91	66
Total interest expense	2,674	3,104	4,701
Net interest income	55,834	51,858	50,882
Provision for loan losses	270	0	3,700
Net interest income after provision for loan losses	55,564	51,858	47,182
Non-interest income
Net recoveries on investment securities	22	20	120
BOLI net earnings	613	597	591
Gain on sales of loans, net	1,510	5,904	5,979
Valuation recovery (allowance) on loan servicing rights, net	119	110	(221)
Other, net	975	1,245	1,921
Total non-interest income, net	12,624	17,161	17,188
Non-interest expense
Salaries and employee benefits	20,816	18,750	18,351
Premises and equipment	3,736	3,942	3,962
Loss (gain) on sales/dispositions of premises and equipment, net	13	0	(98)
Advertising	695	625	631
OREO and other repossessed assets, net	(17)	(87)	276
ATM and debit card interchange transaction fees	1,943	1,831	1,628
Postage and courier	577	587	568
Amortization of CDI	316	361	406
State and local taxes	1,062	1,088	998
Professional fees	1,747	1,006	1,107
Federal Deposit Insurance Corporation ("FDIC") insurance	506	415	204
Loan administration and foreclosure	508	471	448
Data processing and telecommunications	2,719	2,510	2,285
Deposit operations	1,235	1,091	1,114
Other	2,770	2,001	2,183
Total non-interest expense, net	38,626	34,591	34,063
Income before income taxes and equity in undistributed     income of Bank	29,562	34,428	30,307
Provision for income taxes	5,962	6,845	6,038
Net income	$ 23,600	$ 27,583	$ 24,269
Net income per common share
Basic (in dollars per share)	$ 2.84	$ 3.31	$ 2.91
Diluted (in dollars per share)	$ 2.82	$ 3.27	$ 2.88
Service charges on deposits
Non-interest income
Service charges on deposits	$ 3,964	$ 3,911	$ 4,147
ATM and debit card interchange transaction fees
Non-interest income
Service charges on deposits	5,210	5,084	4,378
Escrow fees
Non-interest income
Service charges on deposits	211	290	$ 273
Fee income from non-deposit investment sales
Non-interest income
Service charges on deposits	$ 27	$ 23