Income Taxes	9 Months Ended
Sep. 30, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Our effective tax rate for the three and nine months ended September 30, 2019 was 16.2% and 14.8%, respectively, compared to 21.6% and 17.2% for the three and nine months ended September 30, 2018, respectively. 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. Excess tax benefits were $27,604 and $86,809 for the three and nine months ended September 30, 2019, respectively and $12,585 and $58,607 for the three and nine months ended September 30, 2018, respectively.

Income Taxes

9 Months Ended

Sep. 30, 2019

Our effective tax rate for the three and nine months ended September 30, 2019 was 16.2% and 14.8%, respectively, compared to 21.6% and 17.2% for the three and nine months ended September 30, 2018, respectively. 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. Excess tax benefits were $27,604 and $86,809 for the three and nine months ended September 30, 2019, respectively and $12,585 and $58,607 for the three and nine months ended September 30, 2018, respectively.