Income Taxes - Reconciliation of income tax expense at statutory rate (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Tax at statutory rate	$ 3,227	$ 3,136	$ 6,721	$ 5,665
Nontaxable municipal income	(117)	(76)	(225)	(157)
State tax, net of Federal benefit	131	165	295	179
Cash surrender value of Bank-owned life insurance	(99)	(67)	(195)	(134)
Tax credit benefits	(4)	(2)	(7)	(4)
Other, net	35	111	71	161
Total income tax provision	$ 3,173	$ 3,267	$ 6,660	$ 5,710