Loans and Allowance for Loan Losses (Details 4) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Ending allowance balance attributable to loans:
Individually evaluated for impairment	$ 178	$ 1,012
Collectively evaluated for impairment	4,690	4,182
Total ending allowance balance	4,868	5,194	$ 5,202	$ 3,764
Loan Portfolio:
Individually evaluated for impairment	6,966	9,812
Collectively evaluated for impairment	412,802	384,442
Total ending loan balance	419,768	394,254
Commercial
Ending allowance balance attributable to loans:
Individually evaluated for impairment		834
Collectively evaluated for impairment	1,394	1,143
Total ending allowance balance	1,394	1,977	2,064	593
Loan Portfolio:
Individually evaluated for impairment	106	1,347
Collectively evaluated for impairment	96,175	83,266
Total ending loan balance	96,281	84,613
Commercial real estate
Ending allowance balance attributable to loans:
Individually evaluated for impairment	178	178
Collectively evaluated for impairment	2,894	2,748
Total ending allowance balance	3,072	2,926	2,754	2,638
Loan Portfolio:
Individually evaluated for impairment	6,860	8,465
Collectively evaluated for impairment	231,832	228,672
Total ending loan balance	238,692	237,137
Residential real estate
Ending allowance balance attributable to loans:
Collectively evaluated for impairment	163	153
Total ending allowance balance	163	153	229	356
Loan Portfolio:
Collectively evaluated for impairment	57,008	45,414
Total ending loan balance	57,008	45,414
Consumer | Home equity
Ending allowance balance attributable to loans:
Collectively evaluated for impairment	150	52
Total ending allowance balance	150	52	60	88
Loan Portfolio:
Collectively evaluated for impairment	25,061	23,334
Total ending loan balance	25,061	23,334
Consumer | Other
Ending allowance balance attributable to loans:
Collectively evaluated for impairment	89	86
Total ending allowance balance	89	86	$ 95	$ 89
Loan Portfolio:
Collectively evaluated for impairment	2,726	3,756
Total ending loan balance	$ 2,726	$ 3,756