Loans and Allowance for Credit Losses - Collateral dependent loans and related ACL (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Financing Receivable, Past Due [Line Items]
Total Loans Receivable	$ 4,100,768	$ 3,850,035
Related allowance for credit losses	51,629	52,516	$ 47,820	$ 33,192
Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total Loans Receivable	510,259	450,147
Related allowance for credit losses	6,952	6,233	5,235	3,597
Agriculture production
Financing Receivable, Past Due [Line Items]
Total Loans Receivable	206,128	175,968
Related allowance for credit losses	3,374	835	782	799
Consumer
Financing Receivable, Past Due [Line Items]
Total Loans Receivable	55,387	59,671
Related allowance for credit losses	952	578	490	402
All other loans
Financing Receivable, Past Due [Line Items]
Total Loans Receivable	5,102	3,981
Related allowance for credit losses	4	17	$ 21	$ 14
Real Estate
Financing Receivable, Past Due [Line Items]
Total Loans Receivable	41,259	24,254
Real Estate | 1-4 residential real estate
Financing Receivable, Past Due [Line Items]
Total Loans Receivable	752	797
Real Estate | Commercial Real Estate | Non-owner occupied
Financing Receivable, Past Due [Line Items]
Total Loans Receivable	31,764	23,457
Real Estate | Commercial Real Estate | Owner occupied
Financing Receivable, Past Due [Line Items]
Total Loans Receivable	811
Real Estate | Construction and land development
Financing Receivable, Past Due [Line Items]
Total Loans Receivable	5,743
Real Estate | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total Loans Receivable	494
Land
Financing Receivable, Past Due [Line Items]
Total Loans Receivable	661
Land | Construction and land development
Financing Receivable, Past Due [Line Items]
Total Loans Receivable	661
Other
Financing Receivable, Past Due [Line Items]
Total Loans Receivable	3,669	2,705
Other | Commercial Real Estate | Owner occupied
Financing Receivable, Past Due [Line Items]
Total Loans Receivable	541
Other | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total Loans Receivable	3,128	2,705
Collateral Pledged
Financing Receivable, Past Due [Line Items]
Total Loans Receivable	45,589	26,959
Related allowance for credit losses	8,153	10,926
Collateral Pledged | 1-4 residential real estate
Financing Receivable, Past Due [Line Items]
Total Loans Receivable	752	797
Related allowance for credit losses	117	116
Collateral Pledged | Commercial Real Estate | Non-owner occupied
Financing Receivable, Past Due [Line Items]
Total Loans Receivable	31,764	23,457
Related allowance for credit losses	6,456	10,175
Collateral Pledged | Commercial Real Estate | Owner occupied
Financing Receivable, Past Due [Line Items]
Total Loans Receivable	1,352
Related allowance for credit losses	290
Collateral Pledged | Construction and land development
Financing Receivable, Past Due [Line Items]
Total Loans Receivable	6,404
Related allowance for credit losses	161
Collateral Pledged | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total Loans Receivable	3,622	2,705
Related allowance for credit losses	$ 1,129	$ 635