LOANS AND THE ALLOWANCE FOR CREDIT LOSSES - Summary of nonaccrual loans with collateral (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Significant Unobservable Inputs (Level 3)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision for loan losses, specific reserves	$ 6,100,000	$ 3,800,000
Total Collateral
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated	45,714,000	50,812,000
Secured by Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated	10,785,000	9,715,000
Secured by Cash and Securities
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated	1,704,000	1,704,000
Secured by Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated	33,225,000	39,393,000
Cash, Securities, and Other | Total Collateral
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated	1,704,000	1,704,000
Cash, Securities, and Other | Secured by Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated	0	0
Cash, Securities, and Other | Secured by Cash and Securities
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated	1,704,000	1,704,000
Cash, Securities, and Other | Secured by Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated	0	0
Consumer and Other | Total Collateral
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated	3,798,000	7,500,000
Consumer and Other | Secured by Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated	3,798,000	0
Consumer and Other | Secured by Cash and Securities
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated	0	0
Consumer and Other | Secured by Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated	0	7,500,000
Construction and Development | Total Collateral
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated	0	2,719,000
Construction and Development | Secured by Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated	0	2,719,000
Construction and Development | Secured by Cash and Securities
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated	0	0
Construction and Development | Secured by Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated	0	0
1-4 Family Residential | Total Collateral
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated	3,007,000	3,016,000
1-4 Family Residential | Secured by Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated	3,007,000	3,016,000
1-4 Family Residential | Secured by Cash and Securities
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated	0	0
1-4 Family Residential | Secured by Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated	0	0
Non-Owner Occupied CRE | Total Collateral
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated	0
Non-Owner Occupied CRE | Secured by Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated	0
Non-Owner Occupied CRE | Secured by Cash and Securities
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated	0
Non-Owner Occupied CRE | Secured by Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated	0
Owner Occupied CRE | Total Collateral
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated	3,980,000	3,980,000
Owner Occupied CRE | Secured by Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated	3,980,000	3,980,000
Owner Occupied CRE | Secured by Cash and Securities
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated	0	0
Owner Occupied CRE | Secured by Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated	0	0
Commercial and Industrial1 [Member] | Total Collateral
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated	33,225,000	31,893,000
Commercial and Industrial1 [Member] | Secured by Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated	0	0
Commercial and Industrial1 [Member] | Secured by Cash and Securities
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated	0	0
Commercial and Industrial1 [Member] | Secured by Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Individually evaluated	$ 33,225,000	$ 31,893,000