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Summary of Significant Accounting Policies (Schedule of Earnings Per Share Basic and Diluted) (Details) (USD $) In Thousands, except Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended
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Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net income | $ 4,984 | $ 5,094 | $ 4,923 | $ 4,924 | $ 4,469 | $ 4,454 | $ 4,353 | $ 4,231 | $ 19,925 | $ 17,507 | $ 13,926
Preferred stock dividends and accretion |  |  |  |  |  |  |  |  | 141 | 281 | 820
Net income available to common stockholders | $ 4,955 | $ 5,066 | $ 4,895 | $ 4,868 | $ 4,441 | $ 4,426 | $ 4,269 | $ 4,090 | $ 19,784 | $ 17,226 | $ 13,106
Average number of common shares outstanding | 16,350,183 | 16,349,480 | 16,348,915 | 16,348,215 | 16,347,564 | 16,347,088 | 16,333,653 | 16,332,327 | 16,349,204 | 16,340,197 | 16,295,761
Plus: effect of dilutive options and warrants |  |  |  |  |  |  |  |  | 37,000 | 11,000 | 19,000
Anti dilutive common shares outstanding |  |  |  |  |  |  |  |  | 14,000 | 42,000 | 79,000
Average number of common shares outstanding used to calculate diluted earnings per common share | 16,396,931 | 16,385,155 | 16,375,774 | 16,373,588 | 16,363,698 | 16,362,635 | 16,341,767 | 16,338,162 | 16,385,692 | 16,351,046 | 16,314,899
Diluted | $ 0.30 | $ 0.31 | $ 0.30 | $ 0.30 | $ 0.27 | $ 0.27 | $ 0.26 | $ 0.25 | $ 1.21 | $ 1.05 | $ 0.80
Basic | $ 0.30 | $ 0.31 | $ 0.30 | $ 0.30 | $ 0.27 | $ 0.27 | $ 0.26 | $ 0.25 | $ 1.21 | $ 1.05 | $ 0.80
Weighted Average [Member] |  |  |  |  |  |  |  |  |  |  |
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] |  |  |  |  |  |  |  |  |  |  |
Average number of common shares outstanding |  |  |  |  |  |  |  |  | 16,349,000 | 16,340,000 | 16,296,000
Average number of common shares outstanding used to calculate diluted earnings per common share |  |  |  |  |  |  |  |  | 16,386,000 | 16,351,000 | 16,315,000

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