LOANS HELD FOR INVESTMENT AND ALLOWANCE FOR CREDIT LOSSES (Loans held for investment by years of origination) (Details) $ in Thousands	Mar. 31, 2020 USD ($)
Commercial, Financial and Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
2020	$ 15,540
2019	59,942
2018	57,032
2017	23,318
2016	19,660
Prior	16,449
Revolving Loans	57,079
Total	249,020
Real Estate - Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
2020	10,866
2019	73,609
2018	24,500
2017	9,548
2016	0
Prior	104
Revolving Loans	3,968
Total	122,595
Real Estate - Commercial Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
2020	55,918
2019	127,418
2018	150,708
2017	109,776
2016	54,597
Prior	131,235
Revolving Loans	26,432
Total	656,084
Real Estate - Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
2020	24,763
2019	92,544
2018	68,321
2017	53,452
2016	26,563
Prior	86,872
Revolving Loans	8,215
Total	360,730
Real Estate - Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
2020	72
2019	405
2018	303
2017	867
2016	206
Prior	3,050
Revolving Loans	191,540
Total	196,443
Real Estate - Home Equity [Member] | Performing Financial Instruments [Member]
Financing Receivable, Recorded Investment [Line Items]
2020	72
2019	405
2018	278
2017	867
2016	206
Prior	3,001
Revolving Loans	190,922
Total	195,751
Real Estate - Home Equity [Member] | Nonperforming Financial Instruments [Member]
Financing Receivable, Recorded Investment [Line Items]
2020	0
2019	0
2018	25
2017	0
2016	0
Prior	49
Revolving Loans	618
Total	692
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
2020	26,670
2019	99,040
2018	76,103
2017	40,572
2016	20,340
Prior	9,075
Revolving Loans	5,715
Total	277,515
Consumer [Member] | Performing Financial Instruments [Member]
Financing Receivable, Recorded Investment [Line Items]
2020	26,670
2019	98,981
2018	76,080
2017	40,469
2016	20,286
Prior	9,047
Revolving Loans	5,704
Total	277,237
Consumer [Member] | Nonperforming Financial Instruments [Member]
Financing Receivable, Recorded Investment [Line Items]
2020	0
2019	59
2018	23
2017	103
2016	54
Prior	28
Revolving Loans	11
Total	278
Pass [Member] | Commercial, Financial and Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
2020	15,540
2019	59,938
2018	56,515
2017	22,991
2016	19,601
Prior	16,357
Revolving Loans	57,074
Total	248,016
Pass [Member] | Real Estate - Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
2020	10,866
2019	73,609
2018	24,500
2017	9,548
2016	0
Prior	104
Revolving Loans	3,968
Total	122,595
Pass [Member] | Real Estate - Commercial Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
2020	48,981
2019	126,785
2018	145,264
2017	107,176
2016	54,565
Prior	121,379
Revolving Loans	25,938
Total	630,088
Pass [Member] | Real Estate - Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
2020	24,620
2019	91,383
2018	67,070
2017	52,706
2016	25,740
Prior	83,396
Revolving Loans	8,215
Total	353,130
Special Mention [Member] | Commercial, Financial and Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
2020	0
2019	4
2018	61
2017	17
2016	0
Prior	65
Revolving Loans	0
Total	147
Special Mention [Member] | Real Estate - Commercial Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
2020	6,782
2019	199
2018	5,139
2017	216
2016	0
Prior	6,819
Revolving Loans	0
Total	19,155
Special Mention [Member] | Real Estate - Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
2020	143
2019	27
2018	128
2017	180
2016	96
Prior	350
Revolving Loans	0
Total	924
Substandard [Member] | Commercial, Financial and Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
2020	0
2019	0
2018	456
2017	310
2016	59
Prior	27
Revolving Loans	5
Total	857
Substandard [Member] | Real Estate - Commercial Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
2020	155
2019	434
2018	305
2017	2,384
2016	32
Prior	3,037
Revolving Loans	494
Total	6,841
Substandard [Member] | Real Estate - Residential [Member]
Financing Receivable, Recorded Investment [Line Items]
2020	0
2019	1,134
2018	1,123
2017	566
2016	727
Prior	3,126
Revolving Loans	0
Total	$ 6,676