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Consolidated Statements of Changes in Stockholders' Equity [Parenthetical] (USD $)
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12 Months Ended | |
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Dec. 31, 2012
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Dec. 31, 2011
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| Cash dividends (in dollars per share) | $ 0.72 | $ 0.60 |
| X | ||||||||||
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- Definition
Aggregate dividends paid during the period for each share of common stock outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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