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Consolidated Statement of Stockholders' Equity (Parentheticals) (USD $) | 12 Months Ended
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Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Consolidated Statement of Stockholders' Equity (Parentheticals) |  |  |
Cash dividends paid per share | $ 0.80 | $ 0.78 | $ 0.76
Sales of Treasury Stock | 20.00 | 85.00 | 125.00
Purchase of Treasury Stock | 0 | 484.00 | 3,955.00

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