Loans and Allowance for Loan Losses (Details 4) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Summary of nonperforming assets including nonaccruing TDRs
Nonaccruing troubled debt restructurings	$ 1,087	$ 1,147
Total nonaccrual loans, including nonaccruing TDRs	6,673	6,650
Other real estate owned	2,887	3,307
Total nonperforming assets	$ 9,560	$ 9,957
Nonperforming assets as a percentage of:
Total assets	0.85%	0.97%
Gross loans	0.99%	1.14%
Total loans over 90 days past due	$ 6,383	$ 5,735
Loans over 90 days past due and still accruing
Accruing troubled debt restructurings	$ 8,173	$ 8,562
Commercial [Member] | Owner occupied RE [Member]
Summary of nonperforming assets including nonaccruing TDRs
Total nonaccrual loans, including nonaccruing TDRs	720	322
Commercial [Member] | Non-owner occupied RE [Member]
Summary of nonperforming assets including nonaccruing TDRs
Total nonaccrual loans, including nonaccruing TDRs	$ 3,018	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	$ 1,178	1,408
Consumer [Member] | Real estate [Member]
Summary of nonperforming assets including nonaccruing TDRs
Total nonaccrual loans, including nonaccruing TDRs	419	457
Consumer [Member] | Home equity [Member]
Summary of nonperforming assets including nonaccruing TDRs
Total nonaccrual loans, including nonaccruing TDRs	$ 250	$ 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	$ 1	$ 1