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Statement of Stockholders' Equity (Parentheticals) (USD $)
9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Statement of Stockholders' Equity (Parentheticals)    
Cash dividends paid per share $ 0.615 $ 0.600
Sales of Treasury Stock 165.00 20.00
Treasury Stock, acquired shares 0 0