LOANS - LOANS BY RISK CATEGORY (Details) $ in Thousands	Sep. 30, 2018 USD ($) item	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)
Breakdown of loans by risk category
Total loans	$ 993,808	$ 811,078	$ 808,149
Minimum
Breakdown of loans by risk category
Credit risk rating for which reserves are established if no specific reserves made | item	6
Maximum
Breakdown of loans by risk category
Credit risk rating for which general reserves are established | item	44
Credit risk rating for which reserves are established if no specific reserves made | item	7
Commercial real estate
Breakdown of loans by risk category
Total loans	$ 475,978	406,742	409,269
Commercial, financial, and agricultural
Breakdown of loans by risk category
Total loans	180,661	156,951	154,638
Commercial construction
Breakdown of loans by risk category
Total loans	23,812	9,243	8,892
One to four family residential real estate
Breakdown of loans by risk category
Total loans	277,508	209,890	204,419
Consumer construction
Breakdown of loans by risk category
Total loans	17,502	10,818	12,684
Consumer
Breakdown of loans by risk category
Total loans	18,347	17,434	$ 18,247
Strong (1)
Breakdown of loans by risk category
Total loans	21,462	14,303
Strong (1) | Commercial real estate
Breakdown of loans by risk category
Total loans	11,708	2,775
Strong (1) | Commercial, financial, and agricultural
Breakdown of loans by risk category
Total loans	9,085	11,528
Strong (1) | Commercial construction
Breakdown of loans by risk category
Total loans	669
Good (2)
Breakdown of loans by risk category
Total loans	30,535	34,594
Good (2) | Commercial real estate
Breakdown of loans by risk category
Total loans	21,277	23,929
Good (2) | Commercial, financial, and agricultural
Breakdown of loans by risk category
Total loans	7,504	8,980
Good (2) | Commercial construction
Breakdown of loans by risk category
Total loans	265	308
Good (2) | One to four family residential real estate
Breakdown of loans by risk category
Total loans	1,489	1,377
Average (3)
Breakdown of loans by risk category
Total loans	264,279	218,157
Average (3) | Commercial real estate
Breakdown of loans by risk category
Total loans	189,357	159,385
Average (3) | Commercial, financial, and agricultural
Breakdown of loans by risk category
Total loans	65,964	53,448
Average (3) | Commercial construction
Breakdown of loans by risk category
Total loans	5,116	2,749
Average (3) | One to four family residential real estate
Breakdown of loans by risk category
Total loans	3,842	2,575
Acceptable
Breakdown of loans by risk category
Total loans	349,290	292,672
Acceptable | Commercial real estate
Breakdown of loans by risk category
Total loans	236,783	207,921
Acceptable | Commercial, financial, and agricultural
Breakdown of loans by risk category
Total loans	94,178	77,964
Acceptable | Commercial construction
Breakdown of loans by risk category
Total loans	8,750	1,310
Acceptable | One to four family residential real estate
Breakdown of loans by risk category
Total loans	9,507	5,449
Acceptable | Consumer
Breakdown of loans by risk category
Total loans	72	28
Acceptable Watch
Breakdown of loans by risk category
Total loans	12,489	14,223
Acceptable Watch | Commercial real estate
Breakdown of loans by risk category
Total loans	7,988	8,700
Acceptable Watch | Commercial, financial, and agricultural
Breakdown of loans by risk category
Total loans	2,221	3,658
Acceptable Watch | Commercial construction
Breakdown of loans by risk category
Total loans	960	648
Acceptable Watch | One to four family residential real estate
Breakdown of loans by risk category
Total loans	1,317	1,212
Acceptable Watch | Consumer
Breakdown of loans by risk category
Total loans	3	5
Substandard (6)
Breakdown of loans by risk category
Total loans	15,778	9,404
Substandard (6) | Commercial real estate
Breakdown of loans by risk category
Total loans	8,865	4,032
Substandard (6) | Commercial, financial, and agricultural
Breakdown of loans by risk category
Total loans	1,709	1,373
Substandard (6) | Commercial construction
Breakdown of loans by risk category
Total loans	833	374
Substandard (6) | One to four family residential real estate
Breakdown of loans by risk category
Total loans	4,343	3,515
Substandard (6) | Consumer construction
Breakdown of loans by risk category
Total loans	11	14
Substandard (6) | Consumer
Breakdown of loans by risk category
Total loans	17	96
Rating Unassigned
Breakdown of loans by risk category
Total loans	299,975	227,725
Rating Unassigned | Commercial construction
Breakdown of loans by risk category
Total loans	7,219	3,854
Rating Unassigned | One to four family residential real estate
Breakdown of loans by risk category
Total loans	257,010	195,762
Rating Unassigned | Consumer construction
Breakdown of loans by risk category
Total loans	17,491	10,804
Rating Unassigned | Consumer
Breakdown of loans by risk category
Total loans	$ 18,255	$ 17,305