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LOANS HELD FOR INVESTMENT AND ALLOWANCE FOR CREDIT LOSSES (Recorded investment in nonaccrual and past due loans) (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Dec. 31, 2022
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Nonaccrual, with ACL $ 2,830 $ 1,908
Nonaccrual With No ACL 1,864 389
90+ Days Still Accruing 0 0
Commercial, Financial and Agricultural [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Nonaccrual, with ACL 56 41
Nonaccrual With No ACL 0 0
90+ Days Still Accruing 0 0
Real Estate - Construction [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Nonaccrual, with ACL 275 17
Nonaccrual With No ACL 0 0
90+ Days Still Accruing 0 0
Real Estate - Commercial Mortgage [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Nonaccrual, with ACL 129 256
Nonaccrual With No ACL 780 389
90+ Days Still Accruing 0 0
Real Estate - Residential [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Nonaccrual, with ACL 1,210 239
Nonaccrual With No ACL 1,084 0
90+ Days Still Accruing 0 0
Real Estate - Home Equity [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Nonaccrual, with ACL 467 771
Nonaccrual With No ACL 0 0
90+ Days Still Accruing 0 0
Consumer [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Nonaccrual, with ACL 693 584
Nonaccrual With No ACL 0 0
90+ Days Still Accruing $ 0 $ 0