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Consolidated Statements of Changes in Stockholders' Equity (Parentheticals) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Common cash dividends declared, dividends per share (in Dollars per share) | $ 0.08 | $ 0.08 | $ 0.08
Proceeds from issuance of common stock, stock options exercised, shares | 79,638 | 23,659 | 41,258
Common Stock [Member] |  |  |
Issuance of common stock, acquisition of Community National Bancorporation, shares |  |  | 834,715
Proceeds from issuance of common stock, Employee Stock Purchase Plan, Shares | 24,033 | 25,321 | 27,110
Proceeds from issuance of common stock, stock options exercised, shares | 78,909 | 23,659 | 41,258
Exchange of common stock, stock options exercised, shares (in Dollars) |  |  | $ 7,679
Exchange of common stock, restricted stock vested, shares | 3,902 | 10,300 | 16,798
Proceeds from issuance of common stock, net of issuance costs, shares | 3,680,000 |  |
Retirement of treasury stock, shares | 121,246 |  |

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