LOANS AND THE ALLOWANCE FOR CREDIT LOSSES - Allowance for Loan Losses and Recorded Investment in Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending balance individually evaluated for impairment	$ 363		$ 137
Ending balance collectively evaluated for impairment	12,057		11,903
Total allowance for credit losses	12,420	$ 12,173	12,040	$ 12,162	$ 12,014	$ 11,833
Financing receivables, Ending balance individually evaluated for impairment	2,735		1,970
Financing receivables, Ending balance collectively evaluated for impairment	1,390,008		1,409,072
Total	1,395,393		1,414,280
Receivables acquired with deteriorated credit quality
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	2,650		3,238
Commercial, financial and agricultural
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending balance individually evaluated for impairment	195
Ending balance collectively evaluated for impairment	3,003		2,696
Total allowance for credit losses	3,198	2,856	2,696	2,925	2,866	2,583
Financing receivables, Ending balance individually evaluated for impairment	668		595
Financing receivables, Ending balance collectively evaluated for impairment	258,824		235,652
Total	260,167		237,451
Commercial, financial and agricultural | Receivables acquired with deteriorated credit quality
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	675		1,204
Municipal
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending balance collectively evaluated for impairment	352		590
Total allowance for credit losses	352	622	590	359	530	623
Financing receivables, Ending balance collectively evaluated for impairment	60,590		105,421
Total	60,590		105,421
Real estate loans - residential
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending balance individually evaluated for impairment	116		137
Ending balance collectively evaluated for impairment	2,693		2,745
Total allowance for credit losses	2,809	2,857	2,882	3,043	3,024	3,038
Financing receivables, Ending balance individually evaluated for impairment	701		706
Financing receivables, Ending balance collectively evaluated for impairment	455,431		467,737
Total	456,132		468,443
Real estate loans - commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending balance individually evaluated for impairment	52
Ending balance collectively evaluated for impairment	5,371		5,386
Total allowance for credit losses	5,423	5,281	5,386	5,299	5,149	5,209
Financing receivables, Ending balance individually evaluated for impairment	1,339		647
Financing receivables, Ending balance collectively evaluated for impairment	556,742		555,323
Total	560,056		558,004
Real estate loans - commercial | Receivables acquired with deteriorated credit quality
Financing Receivable, Allowance for Credit Losses [Line Items]
Total	1,975		2,034
Real estate loans - construction
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending balance collectively evaluated for impairment	549		420
Total allowance for credit losses	549	465	420	477	364	325
Financing receivables, Ending balance collectively evaluated for impairment	50,788		34,802
Total	50,788		34,802
Installment
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending balance collectively evaluated for impairment	89		66
Total allowance for credit losses	89	$ 92	66	$ 59	$ 81	13
Financing receivables, Ending balance individually evaluated for impairment	27		22
Financing receivables, Ending balance collectively evaluated for impairment	7,602		10,093
Total	7,629		10,115
All other loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Total allowance for credit losses						$ 42
Financing receivables, Ending balance collectively evaluated for impairment	31		44
Total	$ 31		$ 44