Loans and Allowance for Credit Losses - Collateral dependent loans and related ACL (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2023
Financing Receivable, Past Due [Line Items]
Total Loans Receivable	$ 4,391,808	$ 4,100,768
Related allowance for credit losses	54,912	51,629	$ 52,516	$ 47,820
Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total Loans Receivable	552,557	510,259
Related allowance for credit losses	6,604	6,952	6,233	5,235
Agriculture production
Financing Receivable, Past Due [Line Items]
Total Loans Receivable	219,155	206,128
Related allowance for credit losses	6,275	3,374	$ 835	$ 782
Real Estate
Financing Receivable, Past Due [Line Items]
Total Loans Receivable	41,606	41,259
Real Estate \| 1-4 Family residential real estate
Financing Receivable, Past Due [Line Items]
Total Loans Receivable	2,224	752
Real Estate \| Commercial Real Estate \| Non-owner occupied
Financing Receivable, Past Due [Line Items]
Total Loans Receivable	25,749	31,764
Real Estate \| Commercial Real Estate \| Owner occupied
Financing Receivable, Past Due [Line Items]
Total Loans Receivable	3,827	811
Real Estate \| Construction and land development
Financing Receivable, Past Due [Line Items]
Total Loans Receivable	5,743	5,743
Real Estate \| Agriculture real estate
Financing Receivable, Past Due [Line Items]
Total Loans Receivable	2,949	1,695
Real Estate \| Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total Loans Receivable	1,114	494
Land
Financing Receivable, Past Due [Line Items]
Total Loans Receivable	545	661
Land \| Construction and land development
Financing Receivable, Past Due [Line Items]
Total Loans Receivable	545	661
Other
Financing Receivable, Past Due [Line Items]
Total Loans Receivable	11,794	3,669
Other \| Commercial Real Estate \| Owner occupied
Financing Receivable, Past Due [Line Items]
Total Loans Receivable	468	541
Other \| Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total Loans Receivable	3,246	3,128
Other \| Agriculture production
Financing Receivable, Past Due [Line Items]
Total Loans Receivable	8,080
Collateral Pledged
Financing Receivable, Past Due [Line Items]
Total Loans Receivable	53,945	45,589
Related allowance for credit losses	7,290	8,153
Collateral Pledged \| 1-4 Family residential real estate
Financing Receivable, Past Due [Line Items]
Total Loans Receivable	2,224	752
Related allowance for credit losses		117
Collateral Pledged \| Commercial Real Estate \| Non-owner occupied
Financing Receivable, Past Due [Line Items]
Total Loans Receivable	25,749	31,764
Related allowance for credit losses	4,319	6,456
Collateral Pledged \| Commercial Real Estate \| Owner occupied
Financing Receivable, Past Due [Line Items]
Total Loans Receivable	4,295	1,352
Related allowance for credit losses	512	290
Collateral Pledged \| Construction and land development
Financing Receivable, Past Due [Line Items]
Total Loans Receivable	6,288	6,404
Related allowance for credit losses	143	161
Collateral Pledged \| Agriculture real estate
Financing Receivable, Past Due [Line Items]
Total Loans Receivable	2,949	1,695
Related allowance for credit losses	125
Collateral Pledged \| Commercial and industrial
Financing Receivable, Past Due [Line Items]
Total Loans Receivable	4,360	3,622
Related allowance for credit losses	993	$ 1,129
Collateral Pledged \| Agriculture production
Financing Receivable, Past Due [Line Items]
Total Loans Receivable	8,080
Related allowance for credit losses	$ 1,198