LOANS - Analysis of Impaired Loans (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended		12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Loans Excluding Purchased Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid Contractual Principal Balance	$ 32,927	$ 29,676	$ 30,203	$ 32,927	$ 30,203	$ 29,676
Recorded Investment With No Allowance	8,975	8,324	8,160	8,975	8,160	8,324
Recorded Investment With Allowance	22,106	18,951	19,676	22,106	19,676	18,951
Total Recorded Investment	31,081	27,275	27,836	31,081	27,836	27,275
Related Allowance	2,564	2,465	2,670	2,564	2,670	2,465
Average recorded investment	30,089	25,805	26,582	28,287	26,235	26,063
Purchased Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid Contractual Principal Balance	59,626	59,562	69,076	59,626	69,076	59,562
Recorded Investment With No Allowance	10,732	10,882	25,231	10,732	25,231	10,882
Recorded Investment With Allowance	31,048	31,965	28,933	31,048	28,933	31,965
Total Recorded Investment	41,780	42,847	54,164	41,780	54,164	42,847
Related Allowance	2,442	1,933	2,338	2,442	2,338	1,933
Average recorded investment	42,535	45,488	37,963	42,639	37,274	40,559
Commercial, financial and agricultural | Loans Excluding Purchased Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid Contractual Principal Balance	3,992	1,902	2,297	3,992	2,297	1,902
Recorded Investment With No Allowance	1,881	1,155	1,210	1,881	1,210	1,155
Recorded Investment With Allowance	1,815	513	568	1,815	568	513
Total Recorded Investment	3,696	1,668	1,778	3,696	1,778	1,668
Related Allowance	644	4	87	644	87	4
Average recorded investment	2,580	1,736	1,683	2,276	1,571	1,637
Commercial, financial and agricultural | Purchased Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid Contractual Principal Balance	10,209	5,717	5,945	10,209	5,945	5,717
Recorded Investment With No Allowance	663	473	1,522	663	1,522	473
Recorded Investment With Allowance	1,783	757	80	1,783	80	757
Total Recorded Investment	2,446	1,230	1,602	2,446	1,602	1,230
Related Allowance	0	0	1	0	1	0
Average recorded investment	3,168	1,101	582	2,522	659	836
Real estate – construction and development | Loans Excluding Purchased Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid Contractual Principal Balance	1,866	1,378	850	1,866	850	1,378
Recorded Investment With No Allowance	700	613	679	700	679	613
Recorded Investment With Allowance	573	424	119	573	119	424
Total Recorded Investment	1,273	1,037	798	1,273	798	1,037
Related Allowance	4	3	1	4	1	3
Average recorded investment	1,330	1,229	746	1,232	821	984
Real estate – construction and development | Purchased Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid Contractual Principal Balance	14,353	13,714	16,715	14,353	16,715	13,714
Recorded Investment With No Allowance	1,359	623	7,210	1,359	7,210	623
Recorded Investment With Allowance	6,706	6,511	3,359	6,706	3,359	6,511
Total Recorded Investment	8,065	7,134	10,569	8,065	10,569	7,134
Related Allowance	494	476	521	494	521	476
Average recorded investment	7,504	7,240	4,962	7,381	4,693	5,712
Real estate – commercial and farmland | Loans Excluding Purchased Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid Contractual Principal Balance	6,710	8,950	10,168	6,710	10,168	8,950
Recorded Investment With No Allowance	662	867	665	662	665	867
Recorded Investment With Allowance	5,433	6,649	8,149	5,433	8,149	6,649
Total Recorded Investment	6,095	7,516	8,814	6,095	8,814	7,516
Related Allowance	577	1,591	1,526	577	1,526	1,591
Average recorded investment	6,273	7,537	8,488	6,688	8,107	7,879
Real estate – commercial and farmland | Purchased Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid Contractual Principal Balance	13,365	14,766	17,039	13,365	17,039	14,766
Recorded Investment With No Allowance	1,289	1,115	4,298	1,289	4,298	1,115
Recorded Investment With Allowance	10,692	10,581	10,705	10,692	10,705	10,581
Total Recorded Investment	11,981	11,696	15,003	11,981	15,003	11,696
Related Allowance	1,407	684	1,088	1,407	1,088	684
Average recorded investment	11,573	13,514	11,161	11,614	11,573	12,349
Real estate – residential | Loans Excluding Purchased Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid Contractual Principal Balance	19,924	16,885	16,340	19,924	16,340	16,885
Recorded Investment With No Allowance	5,305	5,144	5,088	5,305	5,088	5,144
Recorded Investment With Allowance	14,285	11,365	10,840	14,285	10,840	11,365
Total Recorded Investment	19,590	16,509	15,928	19,590	15,928	16,509
Related Allowance	1,339	867	1,056	1,339	1,056	867
Average recorded investment	19,474	14,719	15,158	17,621	15,236	15,029
Real estate – residential | Purchased Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid Contractual Principal Balance	21,100	24,839	29,145	21,100	29,145	24,839
Recorded Investment With No Allowance	6,916	8,185	12,017	6,916	12,017	8,185
Recorded Investment With Allowance	11,867	14,116	14,789	11,867	14,789	14,116
Total Recorded Investment	18,783	22,301	26,806	18,783	26,806	22,301
Related Allowance	541	773	728	541	728	773
Average recorded investment	19,741	23,146	21,196	20,594	20,292	21,433
Consumer installment | Loans Excluding Purchased Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid Contractual Principal Balance	435	561	548	435	548	561
Recorded Investment With No Allowance	427	545	518	427	518	545
Recorded Investment With Allowance	0	0	0	0	0	0
Total Recorded Investment	427	545	518	427	518	545
Related Allowance	0	0	0	0	0	0
Average recorded investment	432	584	507	470	500	534
Consumer installment | Purchased Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Unpaid Contractual Principal Balance	599	526	232	599	232	526
Recorded Investment With No Allowance	505	486	184	505	184	486
Recorded Investment With Allowance	0	0	0	0	0	0
Total Recorded Investment	505	486	184	505	184	486
Related Allowance	0	0	0	0	0	0
Average recorded investment	$ 549	$ 487	$ 62	$ 528	$ 57	$ 229