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Income Taxes (Details)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Income Tax Disclosure [Abstract]    
Provision for income taxes as a percentage of earnings before income taxes 37.20%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes 37.40%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes