Loans and Allowance for Loan Losses (Details 7) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Summary of key information for impaired loans
Unpaid Principal Balance	$ 15,542	$ 18,301
Impaired Loans	11,157	13,883
Impaired loans with related allowance for loan losses	7,492	9,363
Related allowance for loan losses	2,644	4,224
Commercial [Member]
Summary of key information for impaired loans
Unpaid Principal Balance	13,221	16,719
Impaired Loans	8,867	12,303
Impaired loans with related allowance for loan losses	5,472	8,357
Related allowance for loan losses	1,874	3,544
Commercial [Member] | Owner occupied RE [Member]
Summary of key information for impaired loans
Unpaid Principal Balance	2,284	964
Impaired Loans	2,243	863
Impaired loans with related allowance for loan losses	2,224	863
Related allowance for loan losses	263	260
Commercial [Member] | Non-owner occupied RE [Member]
Summary of key information for impaired loans
Unpaid Principal Balance	7,238	9,144
Impaired Loans	4,031	5,792
Impaired loans with related allowance for loan losses	1,638	4,161
Related allowance for loan losses	457	1,321
Commercial [Member] | Construction [Member]
Summary of key information for impaired loans
Unpaid Principal Balance		1,855
Impaired Loans		1,787
Impaired loans with related allowance for loan losses		397
Related allowance for loan losses		31
Commercial [Member] | Business [Member]
Summary of key information for impaired loans
Unpaid Principal Balance	3,699	4,756
Impaired Loans	2,593	3,861
Impaired loans with related allowance for loan losses	1,610	2,936
Related allowance for loan losses	1,154	1,932
Consumer [Member]
Summary of key information for impaired loans
Unpaid Principal Balance	2,321	1,582
Impaired Loans	2,290	1,580
Impaired loans with related allowance for loan losses	2,020	1,006
Related allowance for loan losses	770	680
Consumer [Member] | Real estate [Member]
Summary of key information for impaired loans
Unpaid Principal Balance	1,853	1,121
Impaired Loans	1,843	1,121
Impaired loans with related allowance for loan losses	1,843	805
Related allowance for loan losses	682	489
Consumer [Member] | Home equity [Member]
Summary of key information for impaired loans
Unpaid Principal Balance	207	260
Impaired Loans	257	258
Impaired loans with related allowance for loan losses
Related allowance for loan losses
Consumer [Member] | Construction [Member]
Summary of key information for impaired loans
Unpaid Principal Balance
Impaired Loans
Impaired loans with related allowance for loan losses
Related allowance for loan losses
Consumer [Member] | Other [Member]
Summary of key information for impaired loans
Unpaid Principal Balance	261	201
Impaired Loans	190	201
Impaired loans with related allowance for loan losses	177	201
Related allowance for loan losses	$ 88	$ 191