LOANS - Risk Rating (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 1,183,426	$ 1,284,082
Commercial, financial and agricultural
Financing Receivable, Recorded Investment [Line Items]
Loans	435,207	459,574
Real estate – commercial
Financing Receivable, Recorded Investment [Line Items]
Loans	448,406	481,155
Commercial
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 883,613	$ 940,729
Percentage of Total	100.00%	100.00%
Real estate – construction
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 90,287	$ 100,959
Percentage of Total	100.00%	100.00%
Real estate – residential
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 146,751	$ 157,872
Percentage of Total	100.00%	100.00%
Installment loans to individuals
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 56,398	$ 82,660
Lease financing receivable
Financing Receivable, Recorded Investment [Line Items]
Loans	732	1,095
Other
Financing Receivable, Recorded Investment [Line Items]
Loans	5,645	767
Consumer and other commercial, total
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 62,775	$ 84,522
Percentage of Total	100.00%	100.00%
Pass | Commercial, financial and agricultural
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 358,373	$ 346,246
Pass | Real estate – commercial
Financing Receivable, Recorded Investment [Line Items]
Loans	411,280	420,970
Pass | Commercial
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 769,653	$ 767,216
Percentage of Total	87.10%	81.56%
Pass | Real estate – construction
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 89,323	$ 100,775
Percentage of Total	98.93%	99.82%
Pass | Real estate – residential
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 144,250	$ 153,403
Percentage of Total	98.30%	97.17%
Special mention | Commercial, financial and agricultural
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 9,687	$ 22,611
Special mention | Real estate – commercial
Financing Receivable, Recorded Investment [Line Items]
Loans	3,823	23,085
Special mention | Commercial
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 13,510	$ 45,696
Percentage of Total	1.53%	4.86%
Special mention | Real estate – construction
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 600	$ 0
Percentage of Total	0.67%	0.00%
Special mention | Real estate – residential
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 1,233	$ 1,181
Percentage of Total	0.84%	0.75%
Substandard | Commercial, financial and agricultural
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 67,147	$ 90,300
Substandard | Real estate – commercial
Financing Receivable, Recorded Investment [Line Items]
Loans	33,303	37,100
Substandard | Commercial
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 100,450	$ 127,400
Percentage of Total	11.37%	13.54%
Substandard | Real estate – construction
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 364	$ 184
Percentage of Total	0.40%	0.18%
Substandard | Real estate – residential
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 1,268	$ 3,288
Percentage of Total	0.86%	2.08%
Doubtful | Commercial, financial and agricultural
Financing Receivable, Recorded Investment [Line Items]
Loans		$ 417
Doubtful | Real estate – commercial
Financing Receivable, Recorded Investment [Line Items]
Loans		0
Doubtful | Commercial
Financing Receivable, Recorded Investment [Line Items]
Loans		$ 417
Percentage of Total		0.04%
Performing | Installment loans to individuals
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 56,041	$ 82,103
Performing | Lease financing receivable
Financing Receivable, Recorded Investment [Line Items]
Loans	699	1,095
Performing | Other
Financing Receivable, Recorded Investment [Line Items]
Loans	5,645	767
Performing | Consumer and other commercial, total
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 62,385	$ 83,965
Percentage of Total	99.38%	99.34%
Nonperforming | Installment loans to individuals
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 357	$ 557
Nonperforming | Lease financing receivable
Financing Receivable, Recorded Investment [Line Items]
Loans	33	0
Nonperforming | Other
Financing Receivable, Recorded Investment [Line Items]
Loans	0	0
Nonperforming | Consumer and other commercial, total
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 390	$ 557
Percentage of Total	0.62%	0.66%