Loans - Past Due Status (Details) - USD ($)	Jun. 30, 2019	Dec. 31, 2018
Loans on nonaccrual status
Total Past Due	$ 13,025,000	$ 16,861,000
Current	1,076,700,000	1,043,424,000
Total Loans	1,090,335,000	1,062,120,000
90+ days past due and accruing	389,000	324,000
Additional disclosure for nonaccrual loans
Current, nonaccrual status	721,000	458,000
Nonaccrual loans, 30-59 days past due	74,000	97,000
Nonaccrual loans, 60-89 days past due	10,000	560,000
Nonaccrual loans, 90+ days past due	528,000,000,000	1,100,000
PCI
Loans on nonaccrual status
PCI	610,000	1,835,000
30-59 Days Past Due
Loans on nonaccrual status
Total Past Due	10,356,000	12,880,000
60-89 Days Past Due
Loans on nonaccrual status
Total Past Due	1,753,000	2,568,000
90+ Days Past Due
Loans on nonaccrual status
Total Past Due	916,000	1,413,000
Real estate - residential mortgage
Loans on nonaccrual status
Total Past Due	1,544,000	1,258,000
Current	181,322,000	183,359,000
Total Loans	182,981,000	184,901,000
90+ days past due and accruing		9,000
Real estate - residential mortgage | PCI
Loans on nonaccrual status
PCI	115,000	284,000
Real estate - residential mortgage | 30-59 Days Past Due
Loans on nonaccrual status
Total Past Due	1,231,000	1,221,000
Real estate - residential mortgage | 60-89 Days Past Due
Loans on nonaccrual status
Total Past Due	276,000
Real estate - residential mortgage | 90+ Days Past Due
Loans on nonaccrual status
Total Past Due	37,000	37,000
Equity lines
Loans on nonaccrual status
Total Past Due	337,000	955,000
Current	53,369,000	54,615,000
Total Loans	53,741,000	55,660,000
90+ days past due and accruing	9,000
Equity lines | PCI
Loans on nonaccrual status
PCI	35,000	90,000
Equity lines | 30-59 Days Past Due
Loans on nonaccrual status
Total Past Due	142,000	46,000
Equity lines | 60-89 Days Past Due
Loans on nonaccrual status
Total Past Due		584,000
Equity lines | 90+ Days Past Due
Loans on nonaccrual status
Total Past Due	195,000	325,000
Consumer
Loans on nonaccrual status
Total Past Due	15,000	31,000
Current	13,130,000	14,978,000
Total Loans	13,145,000	15,009,000
90+ days past due and accruing	1,000
Consumer | 30-59 Days Past Due
Loans on nonaccrual status
Total Past Due	10,000	31,000
Consumer | 60-89 Days Past Due
Loans on nonaccrual status
Total Past Due	5,000
Consumer Finance
Loans on nonaccrual status
Total Past Due	10,750,000	14,096,000
Current	297,259,000	282,058,000
Total Loans	308,009,000	296,154,000
Consumer Finance | 30-59 Days Past Due
Loans on nonaccrual status
Total Past Due	8,973,000	11,419,000
Consumer Finance | 60-89 Days Past Due
Loans on nonaccrual status
Total Past Due	1,472,000	1,965,000
Consumer Finance | 90+ Days Past Due
Loans on nonaccrual status
Total Past Due	305,000	712,000
Construction Lending | Real estate - construction
Loans on nonaccrual status
Current	46,324,000	42,051,000
Total Loans	46,324,000	42,051,000
Consumer lot lending | Real estate - construction
Loans on nonaccrual status
Current	12,048,000	12,410,000
Total Loans	12,048,000	12,410,000
Commercial real estate lending | Commercial, financial and agricultural
Loans on nonaccrual status
Total Past Due	379,000	315,000
Current	314,930,000	309,057,000
Total Loans	315,769,000	310,833,000
90+ days past due and accruing	379,000	315,000
Commercial real estate lending | Commercial, financial and agricultural | PCI
Loans on nonaccrual status
PCI	460,000	1,461,000
Commercial real estate lending | Commercial, financial and agricultural | 90+ Days Past Due
Loans on nonaccrual status
Total Past Due	379,000	315,000
Land acquisition and development lending | Commercial, financial and agricultural
Loans on nonaccrual status
Current	43,515,000	43,404,000
Total Loans	43,515,000	43,404,000
Builder line lending | Commercial, financial and agricultural
Loans on nonaccrual status
Current	34,348,000	31,201,000
Total Loans	34,348,000	31,201,000
Commercial business lending | Commercial, financial and agricultural
Loans on nonaccrual status
Total Past Due		206,000
Current	80,455,000	70,291,000
Total Loans	$ 80,455,000	70,497,000
Commercial business lending | Commercial, financial and agricultural | 30-59 Days Past Due
Loans on nonaccrual status
Total Past Due		163,000
Commercial business lending | Commercial, financial and agricultural | 60-89 Days Past Due
Loans on nonaccrual status
Total Past Due		19,000
Commercial business lending | Commercial, financial and agricultural | 90+ Days Past Due
Loans on nonaccrual status
Total Past Due		$ 24,000