Loans and Allowance for Credit Losses - Allowance for off-balance credit exposure (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Allowance for off-balance sheet credit exposure:
Balance, beginning of period	$ 4,937	$ 2,179	$ 3,358	$ 1,805
Provision (benefit) charged to expense	2,887	500	4,466	874
Balance, end of period	7,824	2,679	7,824	2,679
Residential Real Estate
Allowance for off-balance sheet credit exposure:
Balance, beginning of period	70	34	58	37
Provision (benefit) charged to expense	35	49	47	46
Balance, end of period	105	83	105	83
Construction Real Estate
Allowance for off-balance sheet credit exposure:
Balance, beginning of period	3,629	1,673	2,178	502
Provision (benefit) charged to expense	1,949	50	3,400	1,221
Balance, end of period	5,578	1,723	5,578	1,723
Commercial Real Estate
Allowance for off-balance sheet credit exposure:
Balance, beginning of period	480	170	421	188
Provision (benefit) charged to expense	(139)	165	(80)	147
Balance, end of period	341	335	341	335
Consumer loans
Allowance for off-balance sheet credit exposure:
Balance, beginning of period	56	58	61	218
Provision (benefit) charged to expense	46	16	41	(144)
Balance, end of period	102	74	102	74
Commercial loans
Allowance for off-balance sheet credit exposure:
Balance, beginning of period	702	244	640	860
Provision (benefit) charged to expense	996	220	1,058	(396)
Balance, end of period	$ 1,698	$ 464	$ 1,698	$ 464