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NATURE OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)
$ in Thousands
 1 Months Ended 3 Months Ended
Jan. 31, 2021
Mar. 31, 2025
USD ($)
segment
reporting_unit
branch
Mar. 31, 2024
Dec. 31, 2024
USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Total number of service offices | branch   21    
Accrued interest receivable on available-for-sale and held-to-maturity securities   $ 903   $ 920
Liquidating investment period (in years)   10 years    
Other investments   $ 12,496   12,500
Loans charged off past due more than days   180 days    
Closed end loan charged off past due more than days   120 days    
Interest Receivable   $ 4,554   4,467
Number of operating segments | segment   1    
Number of reporting units | reporting_unit   1    
Carrying amount of investment   $ 4,220    
Effective income tax rate   19.60% 21.30%  
Loan commitments outstanding   $ 5,414    
2018 Equity Incentive Plan        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Vesting period of shares (in years)   3 years    
Time Based Restricted Stock | 2018 Equity Incentive Plan        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Vesting period of shares (in years)   3 years    
Performance-based Restricted Stock | 2018 Equity Incentive Plan        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Vesting period of shares (in years) 3 years 3 years    
Federal Home Loan Bank Short Term Debt        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Advance from FHLB   $ 0   0
Federal Home Loan Bank Long Term Debt        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Advance from FHLB   $ 0   5,000
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 (in years)   10 years    
Minimum | Furniture Fixtures and Equipment        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Useful life of property and equipment (in years)   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 (in years)   40 years    
Maximum | Furniture Fixtures and Equipment        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Useful life of property and equipment (in years)   10 years    
FHLB        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Other investments   $ 3,856   3,865
Federal Reserve Bank        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Other investments   5,722   5,717
Bankers Bank Stock        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Other investments   $ 2,918   $ 2,918
Commercial Loan        
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Interest income discontinued over delinquent days   90 days    
Closed Ended 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