LOANS HELD FOR INVESTMENT AND ALLOWANCE FOR CREDIT LOSSES (Loans held for investment by years of origination) (Details) $ in Thousands	Sep. 30, 2020 USD ($)
Commercial, Financial and Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
2020	$ 230,848
2019	49,899
2018	41,210
2017	17,972
2016	15,431
Prior	12,442
Revolving Loans	35,195
Total	402,997
Real Estate - Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
2020	44,592
2019	65,132
2018	9,019
2017	1,848
2016	0
Prior	0
Revolving Loans	5,213
Total	125,804
Real Estate - Commercial Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
2020	122,021
2019	113,992
2018	145,715
2017	94,781
2016	49,898
Prior	109,513
Revolving Loans	20,144
Total	656,064
Real Estate - Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
2020	71,918
2019	76,273
2018	51,179
2017	44,032
2016	21,751
Prior	74,363
Revolving Loans	6,685
Total	346,201
Real Estate - Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
2020	1,416
2019	337
2018	246
2017	852
2016	190
Prior	2,503
Revolving Loans	191,819
Total	197,363
Real Estate - Home Equity [Member] | Performing Financial Instruments [Member]
Financing Receivable, Recorded Investment [Line Items]
2020	1,416
2019	337
2018	246
2017	852
2016	190
Prior	2,486
Revolving Loans	191,244
Total	196,771
Real Estate - Home Equity [Member] | Nonperforming Financial Instruments [Member]
Financing Receivable, Recorded Investment [Line Items]
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	17
Revolving Loans	575
Total	592
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
2020	78,373
2019	79,432
2018	59,053
2017	29,446
2016	13,502
Prior	4,117
Revolving Loans	5,809
Total	269,732
Consumer [Member] | Performing Financial Instruments [Member]
Financing Receivable, Recorded Investment [Line Items]
2020	78,369
2019	79,432
2018	59,009
2017	29,446
2016	13,469
Prior	4,078
Revolving Loans	5,809
Total	269,612
Consumer [Member] | Nonperforming Financial Instruments [Member]
Financing Receivable, Recorded Investment [Line Items]
2020	4
2019	0
2018	44
2017	0
2016	33
Prior	39
Revolving Loans	0
Total	120
Pass [Member] | Commercial, Financial and Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
2020	230,847
2019	49,683
2018	40,767
2017	17,780
2016	15,419
Prior	12,374
Revolving Loans	35,191
Total	402,061
Pass [Member] | Real Estate - Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
2020	44,592
2019	64,158
2018	9,019
2017	1,848
2016	0
Prior	0
Revolving Loans	5,213
Total	124,830
Pass [Member] | Real Estate - Commercial Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
2020	115,966
2019	113,732
2018	145,628
2017	91,828
2016	49,478
Prior	100,856
Revolving Loans	19,650
Total	637,138
Pass [Member] | Real Estate - Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
2020	71,096
2019	75,094
2018	49,849
2017	42,965
2016	20,807
Prior	71,879
Revolving Loans	6,685
Total	338,375
Special Mention [Member] | Commercial, Financial and Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
2020	1
2019	4
2018	33
2017	0
2016	0
Prior	59
Revolving Loans	0
Total	97
Special Mention [Member] | Real Estate - Commercial Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
2020	5,849
2019	123
2018	0
2017	215
2016	390
Prior	6,126
Revolving Loans	0
Total	12,703
Special Mention [Member] | Real Estate - Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
2020	142
2019	25
2018	127
2017	177
2016	96
Prior	334
Revolving Loans	0
Total	901
Substandard [Member] | Commercial, Financial and Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
2020	0
2019	212
2018	410
2017	192
2016	12
Prior	9
Revolving Loans	4
Total	839
Substandard [Member] | Real Estate - Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
2020	0
2019	974
2018	0
2017	0
2016	0
Prior	0
Revolving Loans	0
Total	974
Substandard [Member] | Real Estate - Commercial Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
2020	206
2019	137
2018	87
2017	2,738
2016	30
Prior	2,531
Revolving Loans	494
Total	6,223
Substandard [Member] | Real Estate - Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
2020	680
2019	1,154
2018	1,203
2017	890
2016	848
Prior	2,150
Revolving Loans	0
Total	$ 6,925