Quarterly report [Sections 13 or 15(d)]

LOANS HELD FOR INVESTMENT AND ALLOWANCE FOR CREDIT LOSSES (Loan Portfolio Aging) (Details)

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LOANS HELD FOR INVESTMENT AND ALLOWANCE FOR CREDIT LOSSES (Loan Portfolio Aging) (Details) - USD ($)
$ in Thousands
Sep. 30, 2026
Dec. 31, 2025
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans $ 2,489,724 $ 2,546,118
Nonaccrual loans 7,355 8,595
Total Past Due [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 4,187 7,017
Total Current [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 2,478,182 2,530,506
30-59 DPD [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 3,365 4,653
60-89 DPD [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 822 2,364
90 +DPD [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 0 0
Commercial, Financial and Agricultural [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 168,144 180,341
Nonaccrual loans 118 1,278
Commercial, Financial and Agricultural [Member] | Total Past Due [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 246 709
Commercial, Financial and Agricultural [Member] | Total Current [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 167,780 178,354
Commercial, Financial and Agricultural [Member] | 30-59 DPD [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 246 537
Commercial, Financial and Agricultural [Member] | 60-89 DPD [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 0 172
Commercial, Financial and Agricultural [Member] | 90 +DPD [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 0 0
Real Estate - Construction [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 149,335 146,920
Nonaccrual loans 379 0
Real Estate - Construction [Member] | Total Past Due [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 634 295
Real Estate - Construction [Member] | Total Current [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 148,322 146,625
Real Estate - Construction [Member] | 30-59 DPD [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 0 295
Real Estate - Construction [Member] | 60-89 DPD [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 634 0
Real Estate - Construction [Member] | 90 +DPD [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 0 0
Real Estate - Commercial Mortgage [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 736,380 768,731
Nonaccrual loans 2,073 2,560
Real Estate - Commercial Mortgage [Member] | Total Past Due [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 1,829 1,386
Real Estate - Commercial Mortgage [Member] | Total Current [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 732,478 764,785
Real Estate - Commercial Mortgage [Member] | 30-59 DPD [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 1,829 1,386
Real Estate - Commercial Mortgage [Member] | 60-89 DPD [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 0 0
Real Estate - Commercial Mortgage [Member] | 90 +DPD [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 0 0
Real Estate - Residential [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 1,004,438 1,025,690
Nonaccrual loans 3,825 2,143
Real Estate - Residential [Member] | Total Past Due [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 386 2,737
Real Estate - Residential [Member] | Total Current [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 1,000,227 1,020,810
Real Estate - Residential [Member] | 30-59 DPD [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 235 807
Real Estate - Residential [Member] | 60-89 DPD [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 151 1,930
Real Estate - Residential [Member] | 90 +DPD [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 0 0
Real Estate - Home Equity [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 246,120 240,897
Nonaccrual loans 264 1,769
Real Estate - Home Equity [Member] | Total Past Due [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 122 67
Real Estate - Home Equity [Member] | Total Current [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 245,734 239,061
Real Estate - Home Equity [Member] | 30-59 DPD [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 122 67
Real Estate - Home Equity [Member] | 60-89 DPD [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 0 0
Real Estate - Home Equity [Member] | 90 +DPD [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 0 0
Consumer [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 185,307 183,539
Nonaccrual loans 696 845
Consumer [Member] | Total Past Due [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 970 1,823
Consumer [Member] | Total Current [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 183,641 180,871
Consumer [Member] | 30-59 DPD [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 933 1,561
Consumer [Member] | 60-89 DPD [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans 37 262
Consumer [Member] | 90 +DPD [Member]    
Financing Receivable, Recorded Investment, Past Due [Line Items]    
Total Loans $ 0 $ 0