LOANS HELD FOR INVESTMENT AND ALLOWANCE FOR CREDIT LOSSES (Loan Portfolio Aging) (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	$ 4,694	$ 2,297
Total Loans	2,705,181	2,547,685
Total Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	5,577	7,829
Total Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	2,694,910	2,537,559
30-59 DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	4,490	5,137
60-89 DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	1,087	2,692
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	221,704
Nonaccrual loans	56	41
Total Loans	221,704	247,362
Commercial, Financial and Agricultural [Member] \| Total Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	412	235
Commercial, Financial and Agricultural [Member] \| Total Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	221,236	247,086
Commercial, Financial and Agricultural [Member] \| 30-59 DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	306	109
Commercial, Financial and Agricultural [Member] \| 60-89 DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	106	126
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	197,526
Nonaccrual loans	275	17
Total Loans	197,526	234,519
Real Estate - Construction [Member] \| Total Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	0	359
Real Estate - Construction [Member] \| Total Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	197,251	234,143
Real Estate - Construction [Member] \| 30-59 DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	0	359
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	828,234
Nonaccrual loans	909	645
Total Loans	828,234	782,557
Real Estate - Commercial Mortgage [Member] \| Total Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	437	307
Real Estate - Commercial Mortgage [Member] \| Total Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	826,888	781,605
Real Estate - Commercial Mortgage [Member] \| 30-59 DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	393	158
Real Estate - Commercial Mortgage [Member] \| 60-89 DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	44	149
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	967,913
Nonaccrual loans	2,294	239
Total Loans	967,913	749,513
Real Estate - Residential [Member] \| Total Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	448	1,375
Real Estate - Residential [Member] \| Total Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	965,171	747,899
Real Estate - Residential [Member] \| 30-59 DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	331	845
Real Estate - Residential [Member] \| 60-89 DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	117	530
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	203,606
Nonaccrual loans	467	771
Total Loans	203,606	208,217
Real Estate - Home Equity [Member] \| Total Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	447	35
Real Estate - Home Equity [Member] \| Total Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	202,692	207,411
Real Estate - Home Equity [Member] \| 30-59 DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	420	0
Real Estate - Home Equity [Member] \| 60-89 DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	27	35
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	286,198
Nonaccrual loans	693	584
Total Loans	286,198	325,517
Consumer [Member] \| Total Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	3,833	5,518
Consumer [Member] \| Total Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	281,672	319,415
Consumer [Member] \| 30-59 DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	3,040	3,666
Consumer [Member] \| 60-89 DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	793	1,852
Consumer [Member] \| 90 +DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	$ 0	$ 0

Amortized cost of financing receivable on nonaccrual status. Excludes net investment in lease.

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