Loans and Allowance for Credit Losses - Balance and activity in the Allowance for credit losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2025	Mar. 31, 2024
Allowance for credit losses:
Balance, beginning of period	$ 54,740	$ 50,084	$ 52,516	$ 47,820
Provision (benefit) charged to expense	1,300	1,358	3,822	4,850
Losses charged off	(1,119)	(114)	(1,558)	(1,430)
Recoveries	19	8	160	96
Balance, end of period	54,940	51,336	54,940	51,336
Commercial and industrial
Allowance for credit losses:
Balance, beginning of period	8,063	5,850	6,233	5,235
Provision (benefit) charged to expense	(415)	(245)	1,443	549
Losses charged off	(88)	(65)	(153)	(249)
Recoveries	12	3	49	8
Balance, end of period	7,572	5,543	7,572	5,543
Agriculture production
Allowance for credit losses:
Balance, beginning of period	1,060	570	835	782
Provision (benefit) charged to expense	1,105	122	1,330	(90)
Losses charged off	(976)		(976)
Recoveries	2		2
Balance, end of period	1,191	692	1,191	692
Consumer
Allowance for credit losses:
Balance, beginning of period	603	454	578	490
Provision (benefit) charged to expense	533	21	748	162
Losses charged off	(45)	(48)	(246)	(257)
Recoveries	5	5	16	37
Balance, end of period	1,096	432	1,096	432
All other loans
Allowance for credit losses:
Balance, beginning of period	24	17	17	21
Provision (benefit) charged to expense	(7)	(3)		(7)
Balance, end of period	17	14	17	14
Secured by real estate | 1-4 residential real estate
Allowance for credit losses:
Balance, beginning of period	12,664	9,574	10,528	9,474
Provision (benefit) charged to expense	(1,323)	(121)	817	(13)
Losses charged off	(10)	(1)	(60)	(42)
Recoveries			46	33
Balance, end of period	11,331	9,452	11,331	9,452
Secured by real estate | Commercial Real Estate | Non-owner occupied
Allowance for credit losses:
Balance, beginning of period	13,660	16,599	19,055	13,863
Provision (benefit) charged to expense	3,912	2,157	(1,483)	5,389
Losses charged off				(496)
Balance, end of period	17,572	18,756	17,572	18,756
Secured by real estate | Commercial Real Estate | Owner occupied
Allowance for credit losses:
Balance, beginning of period	5,707	4,814	4,815	5,168
Provision (benefit) charged to expense	(627)	(363)	387	(717)
Losses charged off			(122)
Balance, end of period	5,080	4,451	5,080	4,451
Secured by real estate | Multi-family real estate
Allowance for credit losses:
Balance, beginning of period	5,725	6,188	5,447	6,806
Provision (benefit) charged to expense	(485)	437	(254)	(84)
Losses charged off				(97)
Recoveries			47
Balance, end of period	5,240	6,625	5,240	6,625
Secured by real estate | Construction and land development
Allowance for credit losses:
Balance, beginning of period	4,717	3,639	2,901	3,414
Provision (benefit) charged to expense	(1,330)	(425)	487	71
Losses charged off			(1)	(289)
Recoveries				18
Balance, end of period	3,387	3,214	3,387	3,214
Secured by real estate | Agriculture real estate
Allowance for credit losses:
Balance, beginning of period	2,517	2,379	2,107	2,567
Provision (benefit) charged to expense	(63)	(222)	347	(410)
Balance, end of period	$ 2,454	$ 2,157	$ 2,454	$ 2,157