LOANS AND THE ALLOWANCE FOR CREDIT LOSSES - Recorded Investment of Loans, Including Nonaccrual and Restructured Loans, by Class (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Past due loans
Total	$ 1,514,209	$ 1,414,280
Past due	390	702
Accruing loans
Past due loans
Past due	19	0
Non-accrual loans
Past due loans
Past due	1,750	2,650
Restructured
Past due loans
Past due	0	472
Purchase credit impaired
Past due loans
Past due	819	1,050
Commercial, financial and agricultural
Past due loans
Total	257,078	237,451
Past due		251
Municipal
Past due loans
Total	114,509	105,421
Real estate loans - residential
Past due loans
Total	447,527	468,443
Real estate loans - commercial
Past due loans
Total	636,755	558,004
Real estate loans - construction
Past due loans
Total	52,533	34,802
First mortgage | Real estate loans - residential
Past due loans
Total	409,936	426,276
Past due	235	50
Second mortgage | Real estate loans - residential
Past due loans
Total	37,591	42,167
Past due	32	8
Owner occupied | Real estate loans - commercial
Past due loans
Total	226,573	221,008
Past due		323
Non-owner occupied | Real estate loans - commercial
Past due loans
Total	410,182	336,996
Residential | Real estate loans - construction
Past due loans
Total	2,530	2,422
Commercial | Real estate loans - construction
Past due loans
Total	50,003	32,380
Installment
Past due loans
Total	5,790	10,115
Past due	123	70
All other loans
Past due loans
Total	17	44
31-60 Days Past Due
Past due loans
Past due	319	434
31-60 Days Past Due | First mortgage | Real estate loans - residential
Past due loans
Past due	164	50
31-60 Days Past Due | Second mortgage | Real estate loans - residential
Past due loans
Past due	32
31-60 Days Past Due | Owner occupied | Real estate loans - commercial
Past due loans
Past due		323
31-60 Days Past Due | Installment
Past due loans
Past due	123	61
61-90 Days Past Due
Past due loans
Past due	71	268
61-90 Days Past Due | Commercial, financial and agricultural
Past due loans
Past due		251
61-90 Days Past Due | First mortgage | Real estate loans - residential
Past due loans
Past due	71
61-90 Days Past Due | Second mortgage | Real estate loans - residential
Past due loans
Past due		8
61-90 Days Past Due | Installment
Past due loans
Past due		9
Current
Past due loans
Total	1,510,637	1,409,593
Current | Commercial, financial and agricultural
Past due loans
Total	256,894	235,905
Current | Municipal
Past due loans
Total	114,509	105,421
Current | First mortgage | Real estate loans - residential
Past due loans
Total	408,597	425,645
Current | Second mortgage | Real estate loans - residential
Past due loans
Total	37,559	42,159
Current | Owner occupied | Real estate loans - commercial
Past due loans
Total	224,691	219,080
Current | Non-owner occupied | Real estate loans - commercial
Past due loans
Total	410,182	336,514
Current | Residential | Real estate loans - construction
Past due loans
Total	2,530	2,422
Current | Commercial | Real estate loans - construction
Past due loans
Total	50,003	32,380
Current | Installment
Past due loans
Total	5,655	10,023
Current | All other loans
Past due loans
Total	17	44
Nonperforming
Past due loans
Past due	3,182	3,985
Nonperforming | Accruing loans
Past due loans
Past due		210
Nonperforming | Commercial, financial and agricultural
Past due loans
Past due	184	1,295
Nonperforming | First mortgage | Real estate loans - residential
Past due loans
Past due	1,104	581
Nonperforming | Owner occupied | Real estate loans - commercial
Past due loans
Past due	1,882	1,605
Nonperforming | Non-owner occupied | Real estate loans - commercial
Past due loans
Past due		482
Nonperforming | Installment
Past due loans
Past due	$ 12	$ 22