LOANS AND ALLOWANCE FOR CREDIT LOSSES - Schedule of Loan Modifications (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Commercial and industrial \| Extended Maturity
Financing Receivable, Modified [Line Items]
Amortized cost basis		$ 28	$ 661
% of Total Class of Financing Receivables		0.02%	0.61%
Weighted average term increase from modification		3 months	13 months
Agricultural real estate \| Payment Deferral
Financing Receivable, Modified [Line Items]
Amortized cost basis	$ 200	$ 1,984	$ 200
% of Total Class of Financing Receivables	0.29%	2.78%	0.29%
Weighted average term increase from modification	9 months	6 months	9 months
Residential mortgage \| Extended Maturity
Financing Receivable, Modified [Line Items]
Amortized cost basis			$ 17
% of Total Class of Financing Receivables			0.01%
Weighted average term increase from modification			55 months
Residential mortgage \| Payment Deferral
Financing Receivable, Modified [Line Items]
Amortized cost basis		$ 120	$ 120
% of Total Class of Financing Receivables		0.10%	0.10%
Weighted average term increase from modification		3 months	3 months
Commercial real estate \| Extended Maturity
Financing Receivable, Modified [Line Items]
Amortized cost basis	$ 164		$ 164
% of Total Class of Financing Receivables	0.02%		0.02%
Weighted average term increase from modification	2 months		2 months
Commercial real estate \| Payment Deferral
Financing Receivable, Modified [Line Items]
Amortized cost basis	$ 4,263		$ 5,738
% of Total Class of Financing Receivables	0.62%		0.83%
Weighted average term increase from modification	3 months		3 months
Agricultural operating \| Extended Maturity
Financing Receivable, Modified [Line Items]
Amortized cost basis			$ 171
% of Total Class of Financing Receivables			0.54%
Weighted average term increase from modification			8 months
Other consumer \| Extended Maturity and Principal Forgiveness
Financing Receivable, Modified [Line Items]
Amortized cost basis			$ 2
% of Total Class of Financing Receivables			0.00%
Weighted average term increase from modification			3 months
Decrease from modification			$ 2

Amortized cost excluding accrued interest, of financing receivable modified during period for debtor experiencing financial difficulty.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 42
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-Publisher FASB
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