Loans and Allowance for Credit Losses - Balance and activity in the Allowance for credit losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021
Allowance for credit losses:
Balance, beginning of period	$ 37,418	$ 32,543	$ 33,192	$ 33,222
Provision (benefit) charged to expense	365		4,615	(679)
Losses charged off	(303)	(24)	(340)	(68)
Recoveries	3	10	16	54
Balance, end of period	37,483	32,529	37,483	32,529
Residential Real Estate
Allowance for credit losses:
Balance, beginning of period	11,937	10,634	8,908	11,192
Provision (benefit) charged to expense	562	123	3,592	(404)
Losses charged off			(2)	(32)
Recoveries			1	1
Balance, end of period	12,499	10,757	12,499	10,757
Construction Real Estate
Allowance for credit losses:
Balance, beginning of period	2,503	2,045	2,220	2,170
Provision (benefit) charged to expense	251	81	534	(44)
Balance, end of period	2,754	2,126	2,754	2,126
Commercial Real Estate
Allowance for credit losses:
Balance, beginning of period	17,886	14,883	16,838	14,535
Provision (benefit) charged to expense	(835)	(156)	213	192
Losses charged off	(245)		(245)
Balance, end of period	16,806	14,727	16,806	14,727
Consumer loans
Allowance for credit losses:
Balance, beginning of period	693	873	710	916
Provision (benefit) charged to expense	106	(40)	118	(112)
Losses charged off	(41)	(13)	(76)	(25)
Recoveries	3	10	9	51
Balance, end of period	761	830	761	830
Commercial loans
Allowance for credit losses:
Balance, beginning of period	4,399	4,108	4,516	4,409
Provision (benefit) charged to expense	281	(8)	158	(311)
Losses charged off	(17)	(11)	(17)	(11)
Recoveries			6	2
Balance, end of period	$ 4,663	$ 4,089	$ 4,663	$ 4,089