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Income Taxes Effective Income Tax Reconciliation, Percent (Details)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Income Tax Disclosure [Abstract]    
Effective Income Tax Rate Reconciliation, Percent 33.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations 30.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations