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, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Allowance for credit losses:
Balance, beginning of period		$ 37,418	$ 47,820	$ 33,192
Provision (benefit) charged to expense		365	3,492	4,615
Losses charged off		(303)	(1,316)	(340)
Recoveries		3	88	16
Balance, end of period	$ 50,084	37,483	50,084	37,483
Residential Real Estate
Allowance for credit losses:
Balance, beginning of period	14,846	11,937	15,641	8,908
Provision (benefit) charged to expense	250	562	(413)	3,592
Losses charged off			(132)	(2)
Recoveries				1
Balance, end of period	15,096	12,499	15,096	12,499
Construction Real Estate
Allowance for credit losses:
Balance, beginning of period	2,856	2,503	2,664	2,220
Provision (benefit) charged to expense	186	251	489	534
Losses charged off	(178)		(289)
Balance, end of period	2,864	2,754	2,864	2,754
Commercial Real Estate
Allowance for credit losses:
Balance, beginning of period		17,886	22,838	16,838
Provision (benefit) charged to expense		(835)	2,817	213
Losses charged off		(245)	(496)	(245)
Recoveries			18
Balance, end of period	25,177	16,806	25,177	16,806
Consumer loans
Allowance for credit losses:
Balance, beginning of period		693	909	710
Provision (benefit) charged to expense		106	132	118
Losses charged off		(41)	(215)	(76)
Recoveries		3	64	9
Balance, end of period	890	761	890	761
Commercial loans
Allowance for credit losses:
Balance, beginning of period		4,399	5,768	4,516
Provision (benefit) charged to expense		281	467	158
Losses charged off		(17)	(184)	(17)
Recoveries			6	6
Balance, end of period	$ 6,057	$ 4,663	$ 6,057	$ 4,663