Quarterly report pursuant to Section 13 or 15(d)

Income Taxes Income Taxes (Details 4)

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Income Taxes Income Taxes (Details 4) (USD $)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dividends Payable [Line Items]    
Common Stock, Dividends, Per Share, Declared $ 0.130us-gaap_CommonStockDividendsPerShareDeclared $ 0.125us-gaap_CommonStockDividendsPerShareDeclared