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Income Taxes
3 Months Ended
Mar. 31, 2019
Income Tax Disclosure [Abstract]  
Income Taxes
Income Taxes
Our effective tax rate for the three months ended March 31, 2019 was 13.8%, compared to 13.1% for the three months ended March 31, 2018. In both periods, our effective tax rate was favorably impacted by the recognition of income tax benefits related to excess tax benefits from stock option exercises, which totaled $28,478 and $19,567 for the three months ended March 31, 2019 and 2018, respectively.