Loans and Allowance for Loan Losses (Details 2) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016	Dec. 31, 2015
Allowance for loan losses:
Individually evaluated for impairment	$ 1,103	$ 1,080
Collectively evaluated for impairment	9,159	8,806
Total	10,262	9,886	$ 8,631	$ 8,604
Loans outstanding:
Individually evaluated for impairment	9,324	9,144
Collectively evaluated for impairment	1,000,858	964,885
Total	1,010,182	974,029
Commercial, financial, and agricultural
Allowance for loan losses:
Individually evaluated for impairment	446	469
Collectively evaluated for impairment	1,914	2,284
Total	2,360	2,753	2,135	2,153
Loans outstanding:
Individually evaluated for impairment	1,655	1,617
Collectively evaluated for impairment	180,838	181,264
Total	182,493	182,881
Residential real estate | Construction
Allowance for loan losses:
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	99	108
Total	99	108	44	59
Loans outstanding:
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	20,299	18,907
Total	20,299	18,907
Residential real estate | Mortgage
Allowance for loan losses:
Individually evaluated for impairment	354	319
Collectively evaluated for impairment	1,771	2,066
Total	2,125	2,385	2,273	2,439
Loans outstanding:
Individually evaluated for impairment	5,575	5,471
Collectively evaluated for impairment	258,307	254,429
Total	263,882	259,900
Commercial real estate | Construction
Allowance for loan losses:
Individually evaluated for impairment	7	7
Collectively evaluated for impairment	572	406
Total	579	413	687	644
Loans outstanding:
Individually evaluated for impairment	49	49
Collectively evaluated for impairment	70,094	55,604
Total	70,143	55,653
Commercial real estate | Mortgage
Allowance for loan losses:
Individually evaluated for impairment	284	277
Collectively evaluated for impairment	4,447	3,516
Total	4,731	3,793	3,190	2,935
Loans outstanding:
Individually evaluated for impairment	1,986	1,918
Collectively evaluated for impairment	440,280	424,552
Total	442,266	426,470
Installment and other consumer
Allowance for loan losses:
Individually evaluated for impairment	12	8
Collectively evaluated for impairment	310	266
Total	322	274	259	273
Loans outstanding:
Individually evaluated for impairment	59	89
Collectively evaluated for impairment	31,040	30,129
Total	31,099	30,218
Unallocated
Allowance for loan losses:
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	46	160
Total	46	160	$ 43	$ 101
Loans outstanding:
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	0	0
Total	$ 0	$ 0