LOANS HELD FOR INVESTMENT AND ALLOWANCE FOR CREDIT LOSSES (Recorded Investment in Nonaccrual and Past Due Loans) (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual With No ACL	$ 6,662	$ 4,448
Nonaccrual, with ACL	4,481	4,147
90+ Days Still Accruing	0	0
Commercial, Financial and Agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual With No ACL	1,026	1,038
Nonaccrual, with ACL	434	240
90+ Days Still Accruing	0	0
Real Estate - Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual With No ACL	0	0
Nonaccrual, with ACL	0	0
90+ Days Still Accruing	0	0
Real Estate - Commercial Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual With No ACL	1,674	753
Nonaccrual, with ACL	1,597	1,807
90+ Days Still Accruing	0	0
Real Estate - Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual With No ACL	2,605	1,275
Nonaccrual, with ACL	1,055	868
90+ Days Still Accruing	0	0
Real Estate - Home Equity [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual With No ACL	1,357	1,382
Nonaccrual, with ACL	512	387
90+ Days Still Accruing	0	0
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual With No ACL	0	0
Nonaccrual, with ACL	883	845
90+ Days Still Accruing	$ 0	$ 0