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Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Common stock issued in acquisition, shares | 1,873,879 |  |
Exercise of stock options, shares, including tax benefit | 40,000 | 31,875 | 28,750
Reissue of treasury stock, shares | 6,497 | 39,811 | 94,895
Cash dividends declared, per share | $ 0.66 | $ 0.66 | $ 0.66
Additional Paid-In Capital [Member] |  |  |
Common stock issued in acquisition, shares | 1,873,879 |  |
Restricted stock award grants shares | 31,500 | 26,900 | 17,900
Forfeiture of restricted stock award grants, shares |  |  | 1,488
Exercise of stock options, shares, including tax benefit | 40,000 | 31,875 | 28,750
Reissue of treasury stock, shares | 6,497 | 39,811 | 94,895
Retained Earnings [Member] |  |  |
Cash dividends declared, per share | $ 0.66 | $ 0.66 | $ 0.66
Treasury Stock [Member] |  |  |
Restricted stock award grants shares | 31,500 | 26,900 | 17,900
Forfeiture of restricted stock award grants, shares |  |  | 1,488
Exercise of stock options, shares, including tax benefit | 40,000 | 31,875 | 28,750
Reissue of treasury stock, shares | 6,497 | 39,811 | 94,895

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