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NATURE OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)
$ in Thousands
 3 Months Ended
Mar. 31, 2024
USD ($)
reporting_unit
segment
branch
Mar. 31, 2023
USD ($)
Dec. 31, 2023
USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Total number of service offices | branch 23    
Liquidating investment period (in years) 10 years    
Other investments $ 13,022   $ 15,725
Loans charged off past due more than days 180 days    
Closed end loan charged off past due more than days 120 days    
Number of operating segments | segment 1    
Number of reporting units | reporting_unit 1    
Carrying amount of investment $ 27 $ 0  
Vesting period of shares (in years) 3 years    
Effective income tax rate 21.30% 25.50%  
Deferred tax asset valuation allowance $ 1,828    
Loan commitments outstanding 2,437    
Federal Home Loan Bank Short Term Debt      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Advance from FHLB 9,500   44,000
Federal Home Loan Bank Long Term Debt      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Advance from FHLB $ 30,000   35,530
Minimum      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Useful life of intangible assets 72 months    
Minimum | Buildings and Components      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Useful life of property and equipment 10 years    
Minimum | Furniture Fixtures and Equipment      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Useful life of property and equipment 3 years    
Maximum      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Useful life of intangible assets 111 months    
Maximum | Buildings and Components      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Useful life of property and equipment 40 years    
Maximum | Furniture Fixtures and Equipment      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Useful life of property and equipment 10 years    
Other Assets      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Carrying amount of investment $ 2,753    
FHLB      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Other investments 4,595   7,302
Federal Reserve Bank      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Other investments 5,703   5,699
Bankers Bank Stock      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Other investments $ 2,724   $ 2,724
Commercial Loan      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Interest income discontinued over delinquent days 90 days    
Closed End Consumer Loan      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Interest income discontinued over delinquent days 120 days    
Real Estate and Open Ended Consumer Loans      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Interest income discontinued over delinquent days 180 days