LOANS AND ALLOWANCE FOR CREDIT LOSSES - Collateral Dependent Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Without an Allowance	$ 7,821	$ 12,939	$ 3,109
Allowance Allocation	8,413	13,184	10,410
Collateralized Loan Obligations
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	23,818	28,622
Without an Allowance	21,498	24,332
With an Allowance	2,320	4,290
Allowance Allocation	290	791
Collateralized Loan Obligations | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	19,899	25,149
Collateralized Loan Obligations | Other Assets
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	3,919	3,473
Commercial/Agricultural Real Estate | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Without an Allowance	5,125	10,347	636
Allowance Allocation	5,340	10,359	5,514
Commercial/Agricultural Real Estate | Commercial real estate | Collateralized Loan Obligations
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	10,040	15,086
Without an Allowance	8,411	11,350
With an Allowance	1,629	3,736
Allowance Allocation	193	703
Commercial/Agricultural Real Estate | Commercial real estate | Collateralized Loan Obligations | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	10,040	15,086
Commercial/Agricultural Real Estate | Commercial real estate | Collateralized Loan Obligations | Other Assets
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	0	0
Commercial/Agricultural Real Estate | Agricultural real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Without an Allowance	383	391	1,252
Allowance Allocation	382	391	2,496
Commercial/Agricultural Real Estate | Agricultural real estate | Collateralized Loan Obligations
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	6,524	6,605
Without an Allowance	6,524	6,605
With an Allowance	0	0
Allowance Allocation	0	0
Commercial/Agricultural Real Estate | Agricultural real estate | Collateralized Loan Obligations | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	6,524	6,605
Commercial/Agricultural Real Estate | Agricultural real estate | Collateralized Loan Obligations | Other Assets
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	0	0
Commercial/Agricultural Real Estate | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Without an Allowance		54
Allowance Allocation		54
Commercial/Agricultural Real Estate | Construction and land development | Collateralized Loan Obligations
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	258	313
Without an Allowance	258	313
With an Allowance	0	0
Allowance Allocation	0	0
Commercial/Agricultural Real Estate | Construction and land development | Collateralized Loan Obligations | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	258	313
Commercial/Agricultural Real Estate | Construction and land development | Collateralized Loan Obligations | Other Assets
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	0	0
C&I/Agricultural operating: | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Without an Allowance	289		15
Allowance Allocation	440		452
C&I/Agricultural operating: | Commercial and industrial | Collateralized Loan Obligations
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	2,757	2,219
Without an Allowance	2,607	2,219
With an Allowance	150	0
Allowance Allocation	12	0
C&I/Agricultural operating: | Commercial and industrial | Collateralized Loan Obligations | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	0	0
C&I/Agricultural operating: | Commercial and industrial | Collateralized Loan Obligations | Other Assets
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	2,757	2,219
C&I/Agricultural operating: | Agricultural operating
Accounts, Notes, Loans and Financing Receivable [Line Items]
Without an Allowance	1,106	1,180	358
Allowance Allocation	1,106	1,180	794
C&I/Agricultural operating: | Agricultural operating | Collateralized Loan Obligations
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	1,106	1,181
Without an Allowance	1,106	1,181
With an Allowance	0	0
Allowance Allocation	0	0
C&I/Agricultural operating: | Agricultural operating | Collateralized Loan Obligations | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	0	0
C&I/Agricultural operating: | Agricultural operating | Collateralized Loan Obligations | Other Assets
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	1,106	1,181
Residential mortgage: | Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Without an Allowance	900	934	825
Allowance Allocation	1,127	1,167	1,131
Residential mortgage: | Residential mortgage | Collateralized Loan Obligations
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	3,077	3,145
Without an Allowance	2,536	2,591
With an Allowance	541	554
Allowance Allocation	85	88
Residential mortgage: | Residential mortgage | Collateralized Loan Obligations | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	3,077	3,145
Residential mortgage: | Residential mortgage | Collateralized Loan Obligations | Other Assets
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	0	0
Consumer installment: | Originated indirect paper
Accounts, Notes, Loans and Financing Receivable [Line Items]
Without an Allowance	17	15	21
Allowance Allocation	17	15	21
Consumer installment: | Originated indirect paper | Collateralized Loan Obligations
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	46	44
Without an Allowance	46	44
With an Allowance	0	0
Allowance Allocation	0	0
Consumer installment: | Originated indirect paper | Collateralized Loan Obligations | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	0	0
Consumer installment: | Originated indirect paper | Collateralized Loan Obligations | Other Assets
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	46	44
Consumer installment: | Other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Without an Allowance	1	18	2
Allowance Allocation	1	18	$ 2
Consumer installment: | Other consumer | Collateralized Loan Obligations
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	10	29
Without an Allowance	10	29
With an Allowance	0	0
Allowance Allocation	0	0
Consumer installment: | Other consumer | Collateralized Loan Obligations | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	0	0
Consumer installment: | Other consumer | Collateralized Loan Obligations | Other Assets
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	$ 10	$ 29