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Loans - Troubled Debt Restructurings (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2016
USD ($)
loan
Dec. 31, 2015
USD ($)
loan
Loan modifications classified as troubled debt restructurings    
Number of Loans | loan 11 7
Pre-Modification Recorded Investment (in Dollars) $ 1,781 $ 868
Post-Modification Recorded Investment (in Dollars) $ 1,805 $ 868
TDR payment default period 12 months 12 months
Period determining when a past due TDR becomes a subsequent default 90 days 90 days
Real estate - residential mortgage | Interest rate concession    
Loan modifications classified as troubled debt restructurings    
Number of Loans | loan 4 3
Pre-Modification Recorded Investment (in Dollars) $ 815 $ 575
Post-Modification Recorded Investment (in Dollars) $ 839 $ 575
Commercial, financial and agricultural | Commercial real estate lending | Interest rate concession    
Loan modifications classified as troubled debt restructurings    
Number of Loans | loan 3 1
Pre-Modification Recorded Investment (in Dollars) $ 228 $ 15
Post-Modification Recorded Investment (in Dollars) $ 228 $ 15
Commercial, financial and agricultural | Commercial business lending | Interest rate concession    
Loan modifications classified as troubled debt restructurings    
Number of Loans | loan 1 1
Pre-Modification Recorded Investment (in Dollars) $ 100 $ 17
Post-Modification Recorded Investment (in Dollars) $ 100 $ 17
Commercial, financial and agricultural | Commercial business lending | Term concession    
Loan modifications classified as troubled debt restructurings    
Number of Loans | loan 1  
Pre-Modification Recorded Investment (in Dollars) $ 25  
Post-Modification Recorded Investment (in Dollars) $ 25  
Consumer Loan | Interest rate concession    
Loan modifications classified as troubled debt restructurings    
Number of Loans | loan 2 2
Pre-Modification Recorded Investment (in Dollars) $ 613 $ 261
Post-Modification Recorded Investment (in Dollars) $ 613 $ 261