LOANS HELD FOR INVESTMENT AND ALLOWANCE FOR CREDIT LOSSES (Loan Portfolio Aging) (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	$ 2,731,172	$ 2,733,918
Nonaccrual loans	6,798	6,242
Total Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	5,392	6,855
Total Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	2,718,982	2,720,821
30-59 DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	4,999	5,942
60-89 DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	393	913
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	218,298	225,190
Nonaccrual loans	306	311
Commercial, Financial and Agricultural [Member] | Total Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	635	416
Commercial, Financial and Agricultural [Member] | Total Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	217,357	224,463
Commercial, Financial and Agricultural [Member] | 30-59 DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	567	311
Commercial, Financial and Agricultural [Member] | 60-89 DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	68	105
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	202,692	196,091
Nonaccrual loans	322	322
Real Estate - Construction [Member] | Total Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	0	206
Real Estate - Construction [Member] | Total Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	202,370	195,563
Real Estate - Construction [Member] | 30-59 DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	0	206
Real Estate - Construction [Member] | 60-89 DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	0	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	823,690	825,456
Nonaccrual loans	1,432	909
Real Estate - Commercial Mortgage [Member] | Total Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	879	794
Real Estate - Commercial Mortgage [Member] | Total Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	821,379	823,753
Real Estate - Commercial Mortgage [Member] | 30-59 DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	879	794
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	1,016,580	1,004,219
Nonaccrual loans	3,328	2,990
Real Estate - Residential [Member] | Total Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	1,042	704
Real Estate - Residential [Member] | Total Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	1,012,210	1,000,525
Real Estate - Residential [Member] | 30-59 DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	1,040	670
Real Estate - Residential [Member] | 60-89 DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	2	34
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	214,617	210,920
Nonaccrual loans	750	999
Real Estate - Home Equity [Member] | Total Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	101	268
Real Estate - Home Equity [Member] | Total Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	213,766	209,653
Real Estate - Home Equity [Member] | 30-59 DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	101	268
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	255,295	272,042
Nonaccrual loans	660	711
Consumer [Member] | Total Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	2,735	4,467
Consumer [Member] | Total Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	251,900	266,864
Consumer [Member] | 30-59 DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	2,412	3,693
Consumer [Member] | 60-89 DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	323	774
Consumer [Member] | 90 +DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total Loans	$ 0	$ 0