Loans - Summary of the Loan Portfolio by Loan Type and Credit Quality Classification (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Summary of the Loan Portfolio by Loan Type and Credit Quality Classification
Total	$ 1,395,965	$ 1,359,458
Nonclassified
Summary of the Loan Portfolio by Loan Type and Credit Quality Classification
Total	1,375,003	1,340,826
Classified
Summary of the Loan Portfolio by Loan Type and Credit Quality Classification
Total	20,962	18,632
Commercial
Summary of the Loan Portfolio by Loan Type and Credit Quality Classification
Total	592,128	556,522
Commercial | Nonclassified
Summary of the Loan Portfolio by Loan Type and Credit Quality Classification
Total	580,826	547,536
Commercial | Classified
Summary of the Loan Portfolio by Loan Type and Credit Quality Classification
Total	11,302	8,986
Real estate
Summary of the Loan Portfolio by Loan Type and Credit Quality Classification
Total	787,361	786,926
Consumer
Summary of the Loan Portfolio by Loan Type and Credit Quality Classification
Total	16,476	16,010
Consumer | Nonclassified
Summary of the Loan Portfolio by Loan Type and Credit Quality Classification
Total	16,183	15,705
Consumer | Classified
Summary of the Loan Portfolio by Loan Type and Credit Quality Classification
Total	293	305
Commercial and residential | Real estate
Summary of the Loan Portfolio by Loan Type and Credit Quality Classification
Total	616,821	625,665
Commercial and residential | Real estate | Nonclassified
Summary of the Loan Portfolio by Loan Type and Credit Quality Classification
Total	608,771	617,865
Commercial and residential | Real estate | Classified
Summary of the Loan Portfolio by Loan Type and Credit Quality Classification
Total	8,050	7,800
Land and construction | Real estate
Summary of the Loan Portfolio by Loan Type and Credit Quality Classification
Total	95,547	84,428
Land and construction | Real estate | Nonclassified
Summary of the Loan Portfolio by Loan Type and Credit Quality Classification
Total	95,334	84,209
Land and construction | Real estate | Classified
Summary of the Loan Portfolio by Loan Type and Credit Quality Classification
Total	213	219
Home equity | Real estate
Summary of the Loan Portfolio by Loan Type and Credit Quality Classification
Total	74,993	76,833
Home equity | Real estate | Nonclassified
Summary of the Loan Portfolio by Loan Type and Credit Quality Classification
Total	73,889	75,511
Home equity | Real estate | Classified
Summary of the Loan Portfolio by Loan Type and Credit Quality Classification
Total	$ 1,104	$ 1,322