Loans - Loans on Nonaccrual Status (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Loans on nonaccrual status
Loans on nonaccrual status	$ 4,808	$ 6,987
Real estate - residential mortgage
Loans on nonaccrual status
Loans on nonaccrual status	1,747	2,297
Commercial, financial and agricultural | Commercial real estate lending
Loans on nonaccrual status
Loans on nonaccrual status	1,656	2,515
Commercial, financial and agricultural | Builder line lending
Loans on nonaccrual status
Loans on nonaccrual status		359
Commercial, financial and agricultural | Commercial business lending
Loans on nonaccrual status
Loans on nonaccrual status	142	86
Equity lines
Loans on nonaccrual status
Loans on nonaccrual status	765	881
Consumer Loan
Loans on nonaccrual status
Loans on nonaccrual status	3	19
Consumer Finance
Loans on nonaccrual status
Loans on nonaccrual status	$ 495	$ 830