LOANS HELD FOR INVESTMENT AND ALLOWANCE FOR CREDIT LOSSES (Loan Portfolio Aging) (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Financing Receivable, Recorded Investment, Past Due [Line Items]
Nonaccrual loans	$ 4,589	$ 2,297
Total Loans	2,636,884	2,525,180
Total Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	5,061	7,829
Total Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	2,627,234	2,515,054
30-59 DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	4,718	5,137
60-89 DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	343	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	236,263
Nonaccrual loans	12	41
Total Loans	236,263	247,362
Commercial, Financial and Agricultural [Member] \| Total Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	252	235
Commercial, Financial and Agricultural [Member] \| Total Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	235,999	247,086
Commercial, Financial and Agricultural [Member] \| 30-59 DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	248	109
Commercial, Financial and Agricultural [Member] \| 60-89 DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	4	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	253,903
Nonaccrual loans	0	17
Total Loans	253,903	234,519
Real Estate - Construction [Member] \| Total Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	1,137	359
Real Estate - Construction [Member] \| Total Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	252,766	234,143
Real Estate - Construction [Member] \| 30-59 DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	1,137	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	798,438
Nonaccrual loans	2,561	645
Total Loans	798,438	782,557
Real Estate - Commercial Mortgage [Member] \| Total Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	130	307
Real Estate - Commercial Mortgage [Member] \| Total Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	795,747	781,605
Real Estate - Commercial Mortgage [Member] \| 30-59 DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	64	158
Real Estate - Commercial Mortgage [Member] \| 60-89 DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	66	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	834,784
Nonaccrual loans	766	239
Total Loans	834,784	727,105
Loans Held for Sale in nonaccrual status	300
Real Estate - Residential [Member] \| Total Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	1,040	1,375
Real Estate - Residential [Member] \| Total Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	832,978	725,491
Real Estate - Residential [Member] \| 30-59 DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	1,040	845
Real Estate - Residential [Member] \| 60-89 DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	0	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	207,241
Nonaccrual loans	682	771
Total Loans	207,241	208,120
Real Estate - Home Equity [Member] \| Total Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	54	35
Real Estate - Home Equity [Member] \| Total Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	206,505	207,314
Real Estate - Home Equity [Member] \| 30-59 DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	54	0
Real Estate - Home Equity [Member] \| 60-89 DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	0	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	306,255
Nonaccrual loans	568	584
Total Loans	306,255	325,517
Consumer [Member] \| Total Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	2,448	5,518
Consumer [Member] \| Total Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	303,239	319,415
Consumer [Member] \| 30-59 DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	2,175	3,666
Consumer [Member] \| 60-89 DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	273	1,852
Consumer [Member] \| 90 +DPD [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Financing Receivable	$ 0	$ 0

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

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Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

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