Loans and Allowance for Credit Losses - Allowance for off-balance credit exposure (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021
Allowance for off-balance sheet credit exposure:
Balance, beginning of period	$ 4,164	$ 2,179	$ 3,358	$ 1,805
Provision (benefit) charged to expense	773	0	1,579	374
Balance, end of period	4,937	2,179	4,937	2,179
Residential Real Estate
Allowance for off-balance sheet credit exposure:
Balance, beginning of period	193	34	58	37
Provision (benefit) charged to expense	(123)	0	12	(3)
Balance, end of period	70	34	70	34
Construction Real Estate
Allowance for off-balance sheet credit exposure:
Balance, beginning of period	2,897	1,673	2,178	502
Provision (benefit) charged to expense	732	0	1,451	1,171
Balance, end of period	3,629	1,673	3,629	1,673
Commercial Real Estate
Allowance for off-balance sheet credit exposure:
Balance, beginning of period	528	170	421	188
Provision (benefit) charged to expense	(48)	0	59	(18)
Balance, end of period	480	170	480	170
Consumer loans
Allowance for off-balance sheet credit exposure:
Balance, beginning of period	61	58	61	218
Provision (benefit) charged to expense	(5)	0	(5)	(160)
Balance, end of period	56	58	56	58
Commercial loans
Allowance for off-balance sheet credit exposure:
Balance, beginning of period	485	244	640	860
Provision (benefit) charged to expense	217	0	62	(616)
Balance, end of period	$ 702	$ 244	$ 702	$ 244