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NATURE OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)
$ in Thousands
 1 Months Ended 9 Months Ended 12 Months Ended
Jan. 31, 2020
Sep. 30, 2023
USD ($)
Dec. 31, 2024
USD ($)
segment
branch
reporting_unit
Dec. 31, 2023
USD ($)
Property, Plant and Equipment [Line Items]        
Total number of service offices | branch     22  
Accrued interest, held-to-maturity     $ 920  
Liquidating investment period (in years)     10 years  
Other investments     $ 12,500 $ 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 portfolio segments | segment     4  
Accrued interest receivable     $ 4,467  
Number of operating segments | segment     1  
Number of reporting units | reporting_unit     1  
Income taxes receivable     $ 4,480  
Effective income tax rate     21.20% 31.00%
Deferred tax asset valuation allowance   $ 1,828 $ (2,852) $ (1,822)
Loan commitments outstanding     $ 2,949  
Performance-Based Restricted Shares | 2018 Equity Incentive Plan        
Property, Plant and Equipment [Line Items]        
Vesting period of shares, in years 3 years   3 years  
Federal Home Loan Bank Short Term Debt        
Property, Plant and Equipment [Line Items]        
Advance from FHLB     $ 0 44,000
Federal Home Loan Bank Long Term Debt        
Property, Plant and Equipment [Line Items]        
Advance from FHLB     $ 5,000 35,530
Minimum        
Property, Plant and Equipment [Line Items]        
Intangible asset, useful life (in months)     72 months  
Minimum | Buildings and Components        
Property, Plant and Equipment [Line Items]        
Useful lives assets (in years)     10 years  
Minimum | Furniture Fixtures and Equipment        
Property, Plant and Equipment [Line Items]        
Useful lives assets (in years)     3 years  
Maximum        
Property, Plant and Equipment [Line Items]        
Intangible asset, useful life (in months)     111 months  
Maximum | Buildings and Components        
Property, Plant and Equipment [Line Items]        
Useful lives assets (in years)     40 years  
Maximum | Furniture Fixtures and Equipment        
Property, Plant and Equipment [Line Items]        
Useful lives assets (in years)     10 years  
Investment in Federal Home Loan Bank Stock        
Property, Plant and Equipment [Line Items]        
Other investments     $ 3,865 7,302
Federal Reserve Bank        
Property, Plant and Equipment [Line Items]        
Other investments     5,717 5,699
Bankers Bank Stock        
Property, Plant and Equipment [Line Items]        
Other investments     $ 2,918 $ 2,724
Commercial Loan        
Property, Plant and Equipment [Line Items]        
Interest income discontinued over delinquent days     90 days  
Closed End Consumer Loan        
Property, Plant and Equipment [Line Items]        
Interest income discontinued over delinquent days     120 days  
Real Estate and Open Ended Consumer Loans        
Property, Plant and Equipment [Line Items]        
Interest income discontinued over delinquent days     180 days