Loans and Allowance for Loan Losses (Details 4) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Summary of nonperforming assets including nonaccruing TDRs
Nonaccruing troubled debt restructurings	$ 1,301	$ 1,147
Total nonaccrual loans, including nonaccruing TDRs	6,525	6,650
Other real estate owned	2,570	3,307
Total nonperforming assets	9,095	9,957
Nonperforming assets as a percentage of:
Total assets	0.85%	0.97%
Gross loans	1.00%	1.14%
Total loans over 90 days past due	5,828	5,735
Loans over 90 days past due and still accruing
Accruing troubled debt restructurings	8,336	8,562
Commercial [Member] | Owner occupied RE [Member]
Summary of nonperforming assets including nonaccruing TDRs
Total nonaccrual loans, including nonaccruing TDRs	280	322
Commercial [Member] | Non-owner occupied RE [Member]
Summary of nonperforming assets including nonaccruing TDRs
Total nonaccrual loans, including nonaccruing TDRs	3,167	2,344
Commercial [Member] | Construction [Member]
Summary of nonperforming assets including nonaccruing TDRs
Total nonaccrual loans, including nonaccruing TDRs		783
Commercial [Member] | Business [Member]
Summary of nonperforming assets including nonaccruing TDRs
Total nonaccrual loans, including nonaccruing TDRs	1,130	1,408
Consumer [Member] | Real estate [Member]
Summary of nonperforming assets including nonaccruing TDRs
Total nonaccrual loans, including nonaccruing TDRs	457	457
Consumer [Member] | Home equity [Member]
Summary of nonperforming assets including nonaccruing TDRs
Total nonaccrual loans, including nonaccruing TDRs	188	188
Consumer [Member] | Construction [Member]
Summary of nonperforming assets including nonaccruing TDRs
Total nonaccrual loans, including nonaccruing TDRs
Consumer [Member] | Other [Member]
Summary of nonperforming assets including nonaccruing TDRs
Total nonaccrual loans, including nonaccruing TDRs	$ 2	$ 1