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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Impact of Adoption (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Jun. 30, 2023
Jan. 01, 2023
Dec. 31, 2022
Sep. 30, 2022
Jun. 30, 2022
Dec. 31, 2021
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Reserves under Incurred Loss Model       $ 25,178 $ 24,709 $ 23,279 $ 21,180
Allowance for credit loss impact of adoption $ 28,278 $ 28,383   25,178      
Off-balance-sheet, credit risk exposure liability $ 1,700     1,633      
Unallocated reserve              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Reserves under Incurred Loss Model       245      
Commercial loans | Commercial real estate              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Reserves under Incurred Loss Model       13,558      
Commercial loans | Acquisition and development              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Reserves under Incurred Loss Model       3,214      
Commercial loans | Commercial and industrial              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Reserves under Incurred Loss Model       4,505      
Commercial loans | Municipal              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Reserves under Incurred Loss Model       24      
Consumer loans | Residential mortgage              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Reserves under Incurred Loss Model       3,444      
Consumer loans | Installment and other loans              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Reserves under Incurred Loss Model       188      
Cumulative Effect, Period of Adoption, Adjusted Balance              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Allowance for credit loss impact of adoption     $ 27,601        
Off-balance-sheet, credit risk exposure liability     1,733        
Cumulative Effect, Period of Adoption, Adjusted Balance | Unallocated reserve              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Allowance for credit loss impact of adoption     0        
Cumulative Effect, Period of Adoption, Adjusted Balance | Commercial loans | Commercial real estate              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Allowance for credit loss impact of adoption     16,415        
Cumulative Effect, Period of Adoption, Adjusted Balance | Commercial loans | Acquisition and development              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Allowance for credit loss impact of adoption     3,000        
Cumulative Effect, Period of Adoption, Adjusted Balance | Commercial loans | Commercial and industrial              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Allowance for credit loss impact of adoption     5,433        
Cumulative Effect, Period of Adoption, Adjusted Balance | Commercial loans | Municipal              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Allowance for credit loss impact of adoption     193        
Cumulative Effect, Period of Adoption, Adjusted Balance | Consumer loans | Residential mortgage              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Allowance for credit loss impact of adoption     2,323        
Cumulative Effect, Period of Adoption, Adjusted Balance | Consumer loans | Installment and other loans              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Allowance for credit loss impact of adoption     237        
Cumulative Effect, Period of Adoption, Adjustment              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Allowance for credit loss impact of adoption     2,423 $ 2,423      
Off-balance-sheet, credit risk exposure liability     100        
Cumulative Effect, Period of Adoption, Adjustment | Unallocated reserve              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Allowance for credit loss impact of adoption     (245)        
Cumulative Effect, Period of Adoption, Adjustment | Commercial loans | Commercial real estate              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Allowance for credit loss impact of adoption     2,857        
Cumulative Effect, Period of Adoption, Adjustment | Commercial loans | Acquisition and development              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Allowance for credit loss impact of adoption     (214)        
Cumulative Effect, Period of Adoption, Adjustment | Commercial loans | Commercial and industrial              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Allowance for credit loss impact of adoption     928        
Cumulative Effect, Period of Adoption, Adjustment | Commercial loans | Municipal              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Allowance for credit loss impact of adoption     169        
Cumulative Effect, Period of Adoption, Adjustment | Consumer loans | Residential mortgage              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Allowance for credit loss impact of adoption     (1,121)        
Cumulative Effect, Period of Adoption, Adjustment | Consumer loans | Installment and other loans              
New Accounting Pronouncements or Change in Accounting Principle [Line Items]              
Allowance for credit loss impact of adoption     $ 49