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CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Parenthetical) (USD $)
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3 Months Ended | |
|---|---|---|
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Mar. 31, 2012
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Mar. 31, 2011
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| Statement of Stockholders' Equity [Abstract] | ||
| Cash dividends per share | $ 0.36 | $ 0.34 |
| Exercise of stock options and related tax benefit, shares | (30,976) | 16,155 |
| Shares issued for dividend reinvestment plan, shares | 17,383 | 12,751 |
| Shares issued for employee stock ownership plan, shares | 25,655 | 25,139 |
| Directors deferred compensation plan, shares | 1,672 | 3,625 |
| Forfeiture of restricted shares | 200 | 110 |