LOANS AND ALLOWANCE FOR CREDIT LOSSES - Collateral Dependent Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Without an Allowance	$ 13,204
Allowance Allocation	13,456	$ 11,204
Collateralized Loan Obligations
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	26,214
Without an Allowance	25,828
With an Allowance	386
Allowance Allocation	93
Collateralized Loan Obligations | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	21,804
Collateralized Loan Obligations | Other Assets
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	4,410
Commercial/Agricultural Real Estate | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Without an Allowance	10,556
Allowance Allocation	10,570	5,736
Commercial/Agricultural Real Estate | Commercial real estate | Collateralized Loan Obligations
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	11,604
Without an Allowance	11,590
With an Allowance	14
Allowance Allocation	13
Commercial/Agricultural Real Estate | Commercial real estate | Collateralized Loan Obligations | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	11,604
Commercial/Agricultural Real Estate | Commercial real estate | Collateralized Loan Obligations | Other Assets
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	0
Commercial/Agricultural Real Estate | Agricultural real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Without an Allowance	469
Allowance Allocation	469	2,742
Commercial/Agricultural Real Estate | Agricultural real estate | Collateralized Loan Obligations
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	6,900
Without an Allowance	6,900
With an Allowance	0
Allowance Allocation	0
Commercial/Agricultural Real Estate | Agricultural real estate | Collateralized Loan Obligations | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	6,900
Commercial/Agricultural Real Estate | Agricultural real estate | Collateralized Loan Obligations | Other Assets
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	0
Commercial/Agricultural Real Estate | Multi-family real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Without an Allowance	0
Allowance Allocation	0	0
Commercial/Agricultural Real Estate | Multi-family real estate | Collateralized Loan Obligations
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	0
Without an Allowance	0
With an Allowance	0
Allowance Allocation	0
Commercial/Agricultural Real Estate | Multi-family real estate | Collateralized Loan Obligations | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	0
Commercial/Agricultural Real Estate | Multi-family real estate | Collateralized Loan Obligations | Other Assets
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	0
Commercial/Agricultural Real Estate | Construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Without an Allowance	94
Allowance Allocation	94	0
Commercial/Agricultural Real Estate | Construction and land development | Collateralized Loan Obligations
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	206
Without an Allowance	206
With an Allowance	0
Allowance Allocation	0
Commercial/Agricultural Real Estate | Construction and land development | Collateralized Loan Obligations | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	206
Commercial/Agricultural Real Estate | Construction and land development | Collateralized Loan Obligations | Other Assets
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	0
C&I/Agricultural operating | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Without an Allowance	0
Allowance Allocation	0	552
C&I/Agricultural operating | Commercial and industrial | Collateralized Loan Obligations
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	2,970
Without an Allowance	2,970
With an Allowance	0
Allowance Allocation	0
C&I/Agricultural operating | Commercial and industrial | Collateralized Loan Obligations | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	0
C&I/Agricultural operating | Commercial and industrial | Collateralized Loan Obligations | Other Assets
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	2,970
C&I/Agricultural operating | Agricultural operating
Accounts, Notes, Loans and Financing Receivable [Line Items]
Without an Allowance	1,373
Allowance Allocation	1,373	890
C&I/Agricultural operating | Agricultural operating | Collateralized Loan Obligations
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	1,373
Without an Allowance	1,373
With an Allowance	0
Allowance Allocation	0
C&I/Agricultural operating | Agricultural operating | Collateralized Loan Obligations | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	0
C&I/Agricultural operating | Agricultural operating | Collateralized Loan Obligations | Other Assets
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	1,373
Residential Mortgage | Residential mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Without an Allowance	685
Allowance Allocation	923	1,253
Residential Mortgage | Residential mortgage | Collateralized Loan Obligations
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	3,094
Without an Allowance	2,722
With an Allowance	372
Allowance Allocation	80
Residential Mortgage | Residential mortgage | Collateralized Loan Obligations | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	3,094
Residential Mortgage | Residential mortgage | Collateralized Loan Obligations | Other Assets
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	0
Residential Mortgage | Purchased HELOC loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Without an Allowance	0
Allowance Allocation	0	0
Residential Mortgage | Purchased HELOC loans | Collateralized Loan Obligations
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	0
Without an Allowance	0
With an Allowance	0
Allowance Allocation	0
Residential Mortgage | Purchased HELOC loans | Collateralized Loan Obligations | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	0
Residential Mortgage | Purchased HELOC loans | Collateralized Loan Obligations | Other Assets
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	0
Consumer Installment | Originated indirect paper
Accounts, Notes, Loans and Financing Receivable [Line Items]
Without an Allowance	26
Allowance Allocation	26	27
Consumer Installment | Originated indirect paper | Collateralized Loan Obligations
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	40
Without an Allowance	40
With an Allowance	0
Allowance Allocation	0
Consumer Installment | Originated indirect paper | Collateralized Loan Obligations | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	0
Consumer Installment | Originated indirect paper | Collateralized Loan Obligations | Other Assets
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	40
Consumer Installment | Other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Without an Allowance	1
Allowance Allocation	1	$ 4
Consumer Installment | Other consumer | Collateralized Loan Obligations
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	27
Without an Allowance	27
With an Allowance	0
Allowance Allocation	0
Consumer Installment | Other consumer | Collateralized Loan Obligations | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	0
Consumer Installment | Other consumer | Collateralized Loan Obligations | Other Assets
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateral Type	$ 27