LOANS HELD FOR INVESTMENT AND ALLOWANCE FOR CREDIT LOSSES (Loan Portfolio Aging) (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	$ 2,728	$ 4,322
Total Loans	1,985,509	1,931,465
Total Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	3,120	3,600
Total Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	1,979,661	1,923,543
30-59 DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	2,380	2,790
60-89 DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	740	810
90 +DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	0	0
Commercial, Financial and Agricultural [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	230,213
Nonaccrual loans	31	90
Total Loans	230,213	223,086
Commercial, Financial and Agricultural [Member] | Total Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	284	123
Commercial, Financial and Agricultural [Member] | Total Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	229,898	222,873
Commercial, Financial and Agricultural [Member] | 30-59 DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	205	100
Commercial, Financial and Agricultural [Member] | 60-89 DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	79	23
Commercial, Financial and Agricultural [Member] | 90 +DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	0	0
Real Estate - Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	174,293
Nonaccrual loans	0	0
Total Loans	174,293	174,394
Real Estate - Construction [Member] | Total Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	0	0
Real Estate - Construction [Member] | Total Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	174,293	174,394
Real Estate - Construction [Member] | 30-59 DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	0	0
Real Estate - Construction [Member] | 60-89 DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	0	0
Real Estate - Construction [Member] | 90 +DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	0	0
Real Estate - Commercial Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	669,110
Nonaccrual loans	422	604
Total Loans	669,110	663,550
Real Estate - Commercial Mortgage [Member] | Total Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	502	151
Real Estate - Commercial Mortgage [Member] | Total Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	668,186	662,795
Real Estate - Commercial Mortgage [Member] | 30-59 DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	502	151
Real Estate - Commercial Mortgage [Member] | 60-89 DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	0	0
Real Estate - Commercial Mortgage [Member] | 90 +DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	0	0
Real Estate - Residential [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	374,712
Nonaccrual loans	1,204	2,097
Total Loans	374,712	360,021
Real Estate - Residential [Member] | Total Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	503	516
Real Estate - Residential [Member] | Total Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	373,005	357,408
Real Estate - Residential [Member] | 30-59 DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	474	365
Real Estate - Residential [Member] | 60-89 DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	29	151
Real Estate - Residential [Member] | 90 +DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	0	0
Real Estate - Home Equity [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	188,174
Nonaccrual loans	844	1,319
Total Loans	188,174	187,821
Real Estate - Home Equity [Member] | Total Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	47	210
Real Estate - Home Equity [Member] | Total Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	187,283	186,292
Real Estate - Home Equity [Member] | 30-59 DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	47	210
Real Estate - Home Equity [Member] | 60-89 DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	0	0
Real Estate - Home Equity [Member] | 90 +DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	0	0
Consumer [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	349,007
Nonaccrual loans	227	212
Total Loans	349,007	322,593
Consumer [Member] | Total Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	1,784	2,600
Consumer [Member] | Total Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	346,996	319,781
Consumer [Member] | 30-59 DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	1,152	1,964
Consumer [Member] | 60-89 DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	632	636
Consumer [Member] | 90 +DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	$ 0	$ 0