Loans, Net - Consolidated loan portfolio (Details) - USD ($) $ in Thousands		Dec. 31, 2016		Dec. 31, 2015		Dec. 31, 2014	Dec. 31, 2013
Consolidated Loan Portfolio [Abstract]
Total Loans		$ 860,097	[1]	$ 805,681	[1]	$ 754,846
Less allowance for loan losses		11,404		11,046		11,786	$ 13,320
Net loans		$ 848,693		$ 794,635
Percent of Total Portfolio	[1]	100.00%		100.00%
Net of deferred loan costs		$ 3,300		$ 3,500
Real Estate Loans Construction [Member]
Consolidated Loan Portfolio [Abstract]
Total Loans		35,627		39,673		33,050
Less allowance for loan losses		$ 939		$ 905		550	847
Percent of Total Portfolio		4.10%		4.90%
Real Estate Loans Secured by Farmland [Member]
Consolidated Loan Portfolio [Abstract]
Total Loans		$ 16,768		$ 19,062
Percent of Total Portfolio		2.00%		2.40%
Real Estate Loans Secured by 1 - 4 Family Residential [Member]
Consolidated Loan Portfolio [Abstract]
Total Loans		$ 314,045		$ 280,096		265,216
Less allowance for loan losses		$ 2,262		$ 3,341		3,966	6,734
Percent of Total Portfolio		36.50%		34.80%
Other Real Estate Loans [Member]
Consolidated Loan Portfolio [Abstract]
Total Loans		$ 283,613		$ 258,035		255,236
Less allowance for loan losses		$ 3,167		$ 3,761		3,916	3,506
Percent of Total Portfolio		33.00%		32.00%
Commercial Loans [Member]
Consolidated Loan Portfolio [Abstract]
Total Loans		$ 190,767		$ 190,482		163,269
Less allowance for loan losses		$ 3,933		$ 1,706		2,354	1,890
Percent of Total Portfolio		22.20%		23.60%
Consumer Loans [Member]
Consolidated Loan Portfolio [Abstract]
Total Loans		$ 19,277		$ 18,333		18,367
Less allowance for loan losses		$ 976		$ 1,141		$ 821	$ 177
Percent of Total Portfolio		2.20%		2.30%

[1] Includes net deferred loan costs and premiums of $3.3 million and $3.5 million, respectively.