LOAN CREDIT QUALITY AND RELATED ALLOWANCE FOR LOAN LOSSES - Interest Income if Interest Would Have Been Recorded (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Loan credit quality and related allowance for loan losses      
Interest Income That Would Have Been Recorded Based on Original Term and Rate $ 656 $ 398 $ 768
Interest Income Recorded on a Cash Basis 208 145 333
Commercial, Financial, and Agricultural      
Loan credit quality and related allowance for loan losses      
Interest Income That Would Have Been Recorded Based on Original Term and Rate 6 48 42
Interest Income Recorded on a Cash Basis 0 53 33
Residential Real Estate Mortgage      
Loan credit quality and related allowance for loan losses      
Interest Income That Would Have Been Recorded Based on Original Term and Rate 151 53 63
Interest Income Recorded on a Cash Basis 101 38 34
Commercial Real Estate Mortgage      
Loan credit quality and related allowance for loan losses      
Interest Income That Would Have Been Recorded Based on Original Term and Rate 496 281 600
Interest Income Recorded on a Cash Basis 105 54 264
Construction Real Estate Mortgage      
Loan credit quality and related allowance for loan losses      
Interest Income That Would Have Been Recorded Based on Original Term and Rate 3 16 63
Interest Income Recorded on a Cash Basis $ 2 $ 0 $ 2