Loans and Allowance for Loan Losses (Details 4) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Summary of nonperforming assets including nonaccruing TDRs
Nonaccruing troubled debt restructurings	$ 5,365	$ 4,983
Total nonaccrual loans, including nonaccruing TDRs	8,854	8,337
Other real estate owned	1,148	1,198
Total nonperforming assets	10,002	9,535
Nonperforming assets as a percentage of:
Total assets	1.07%	1.07%
Gross loans	1.28%	1.29%
Total loans over 90 days past due	7,196	6,493
Loans over 90 days past due and still accruing
Accruing troubled debt restructurings	7,536	8,045
Commercial [Member] | Owner occupied RE [Member]
Summary of nonperforming assets including nonaccruing TDRs
Total nonaccrual loans, including nonaccruing TDRs	1,191	1,199
Commercial [Member] | Non-owner occupied RE [Member]
Summary of nonperforming assets including nonaccruing TDRs
Total nonaccrual loans, including nonaccruing TDRs	339	373
Commercial [Member] | Construction [Member]
Summary of nonperforming assets including nonaccruing TDRs
Total nonaccrual loans, including nonaccruing TDRs	887	914
Commercial [Member] | Business [Member]
Summary of nonperforming assets including nonaccruing TDRs
Total nonaccrual loans, including nonaccruing TDRs	542	712
Consumer [Member] | Real estate [Member]
Summary of nonperforming assets including nonaccruing TDRs
Total nonaccrual loans, including nonaccruing TDRs	528	76
Consumer [Member] | Home equity [Member]
Summary of nonperforming assets including nonaccruing TDRs
Total nonaccrual loans, including nonaccruing TDRs		77
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	$ 3