Allowance for Loan Losses (Details) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015
Allowance for loan losses [Roll Forward]
Beginning balance	$ 11,046	$ 11,786	$ 11,786
Charge-offs	(569)	(401)	(3,691)
Recoveries	670	422	658
Provision (recovery)	53	(407)	2,293
Ending balance	11,200	11,400	11,046
Ending allowance balance attributable to loans:
Individually evaluated for impairment				$ 2,612	$ 2,664	$ 2,962
Collectively evaluated for impairment				8,588	8,382	8,438
Total ending allowance balance	11,046	11,786	11,786	11,200	11,046	11,400
Loans:
Individually evaluated for impairment				20,433	20,844	20,933
Collectively evaluated for impairment				825,457	784,837	759,934
Total Loans				845,890	805,681	780,867
Construction [Member]
Allowance for loan losses [Roll Forward]
Beginning balance	905	550	550
Charge-offs	(388)	0	0
Recoveries	128	41	246
Provision (recovery)	238	189	109
Ending balance	883	780	905
Ending allowance balance attributable to loans:
Individually evaluated for impairment				0	53	57
Collectively evaluated for impairment				883	852	723
Total ending allowance balance	905	550	550	883	905	780
Loans:
Individually evaluated for impairment				30	203	212
Collectively evaluated for impairment				32,489	39,470	33,169
Total Loans				32,519	39,673	33,381
Real Estate Loans Secured by Farmland [Member]
Allowance for loan losses [Roll Forward]
Beginning balance	192	179	179
Charge-offs	0	0	0
Recoveries	0	0	0
Provision (recovery)	(47)	12	13
Ending balance	145	191	192
Ending allowance balance attributable to loans:
Individually evaluated for impairment				0	0	0
Collectively evaluated for impairment				145	192	191
Total ending allowance balance	192	179	179	145	192	191
Loans:
Individually evaluated for impairment				7,931	7,903	7,903
Collectively evaluated for impairment				8,901	11,159	11,488
Total Loans				16,832	19,062	19,391
Secured by 1-4 family residential [Member]
Allowance for loan losses [Roll Forward]
Beginning balance	3,341	3,966	3,966
Charge-offs	(7)	(100)	(344)
Recoveries	395	338	359
Provision (recovery)	(112)	(369)	(640)
Ending balance	3,617	3,835	3,341
Ending allowance balance attributable to loans:
Individually evaluated for impairment				1,214	1,120	1,376
Collectively evaluated for impairment				2,403	2,221	2,459
Total ending allowance balance	3,341	3,966	3,966	3,617	3,341	3,835
Loans:
Individually evaluated for impairment				4,362	5,127	5,528
Collectively evaluated for impairment				328,046	274,969	267,648
Total Loans				332,408	280,096	273,176
Other real estate loans [Member]
Allowance for loan losses [Roll Forward]
Beginning balance	3,761	3,916	3,916
Charge-offs	(126)	(9)	(9)
Recoveries	27	23	28
Provision (recovery)	(194)	(200)	(174)
Ending balance	3,468	3,730	3,761
Ending allowance balance attributable to loans:
Individually evaluated for impairment				406	464	463
Collectively evaluated for impairment				3,062	3,297	3,267
Total ending allowance balance	3,761	3,916	3,916	3,468	3,761	3,730
Loans:
Individually evaluated for impairment				4,954	4,196	4,220
Collectively evaluated for impairment				245,824	253,839	253,792
Total Loans				250,778	258,035	258,012
Commercial [Member]
Allowance for loan losses [Roll Forward]
Beginning balance	1,706	2,354	2,354
Charge-offs	(31)	(246)	(3,281)
Recoveries	65	11	14
Provision (recovery)	396	(428)	2,619
Ending balance	2,136	1,691	1,706
Ending allowance balance attributable to loans:
Individually evaluated for impairment				190	27	46
Collectively evaluated for impairment				1,946	1,679	1,645
Total ending allowance balance	1,706	2,354	2,354	2,136	1,706	1,691
Loans:
Individually evaluated for impairment				1,285	1,517	768
Collectively evaluated for impairment				192,541	188,965	179,139
Total Loans				193,826	190,482	179,907
Consumer [Member]
Allowance for loan losses [Roll Forward]
Beginning balance	1,141	821	821
Charge-offs	(17)	(46)	(57)
Recoveries	55	9	11
Provision (recovery)	(228)	389	366
Ending balance	951	1,173	1,141
Ending allowance balance attributable to loans:
Individually evaluated for impairment				802	1,000	1,020
Collectively evaluated for impairment				149	141	153
Total ending allowance balance	$ 1,141	$ 821	$ 821	951	1,141	1,173
Loans:
Individually evaluated for impairment				1,871	1,898	2,302
Collectively evaluated for impairment				17,656	16,435	14,698
Total Loans				$ 19,527	$ 18,333	$ 17,000