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Consolidated Statement of Changes in Stockholders' Equity (Parenthetical) (Unaudited) (USD $)	6 Months Ended
	Jun. 30, 2012
Cash dividends per share	$ 0.20
Purchase of treasury stock, shares	8,534
Reissuance of treasury stock for stock option exercises, shares	43,228
Treasury stock
Purchase of treasury stock, shares	8,534
Reissuance of treasury stock for stock option exercises, shares	43,228
Retained earnings
Cash dividends per share	$ 0.20
Reissuance of treasury stock for stock option exercises, shares	43,228

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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