LOANS AND ALLOWANCE FOR CREDIT LOSSES - Schedule of Loan Modifications (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2023	Jun. 30, 2024
Commercial and industrial | Term Extension
Financing Receivable, Modified [Line Items]
Amortized cost basis		$ 8	$ 8	$ 1,450
% of Total Class of Financing Receivables		0.01%	0.01%	1.14%
Commercial and industrial | Other-Than-Insignificant Payment Delay
Financing Receivable, Modified [Line Items]
Amortized cost basis	$ 920			$ 920
% of Total Class of Financing Receivables	0.72%			0.72%
Residential mortgage | Term Extension
Financing Receivable, Modified [Line Items]
Amortized cost basis			$ 37
% of Total Class of Financing Receivables			0.03%
Residential mortgage | Other-Than-Insignificant Payment Delay
Financing Receivable, Modified [Line Items]
Amortized cost basis	$ 163	$ 69	$ 69	$ 245
% of Total Class of Financing Receivables	0.12%	0.06%	0.06%	0.18%
Commercial real estate | Term Extension
Financing Receivable, Modified [Line Items]
Amortized cost basis			$ 5,337	$ 4,434
% of Total Class of Financing Receivables			0.73%	0.61%
Agricultural operating | Term Extension
Financing Receivable, Modified [Line Items]
Amortized cost basis		$ 179	$ 179
% of Total Class of Financing Receivables		0.73%	0.73%
Other consumer | Other-Than-Insignificant Payment Delay
Financing Receivable, Modified [Line Items]
Amortized cost basis			$ 22
% of Total Class of Financing Receivables			0.34%