Income Taxes	6 Months Ended
Jun. 30, 2019
Income Taxes [Abstract]
Income Taxes	11. Income Taxes At the end of each interim period we are required to estimate our annual effective tax rate for the fiscal year, and to use that rate to provide for income taxes for the current year-to-date reporting period. Our 2019 estimated annual effective tax rate of 27.1% is driven by our blended federal and state statutory rate of 24.9%, and certain other permanent differences between GAAP and tax which increased our rate by 2.2%. For the six months ended June 30, 2019 our estimated annual rate of 27.1% was impacted by discrete items which had a net impact of decreasing our rate by 1.6%, including excess tax benefits for vested stock-based compensation. For the three months ended June 30, 2019 and 2018, we recorded income tax expense of $5.3 million and $13.3 million, respectively. For the six months ended June 30, 2019 and 2018, we recorded income tax expense of $11.2 million and $16.4 million, respectively.

Income Taxes

6 Months Ended

Jun. 30, 2019

11. Income Taxes

At the end of each interim period we are required to estimate our annual effective tax rate for the fiscal year, and to use that rate to provide for income taxes for the current year-to-date reporting period. Our 2019 estimated annual effective tax rate of 27.1% is driven by our blended federal and state statutory rate of 24.9%, and certain other permanent differences between GAAP and tax which increased our rate by 2.2%.

For the six months ended June 30, 2019 our estimated annual rate of 27.1% was impacted by discrete items which had a net impact of decreasing our rate by 1.6%, including excess tax benefits for vested stock-based compensation.

For the three months ended June 30, 2019 and 2018, we recorded income tax expense of $5.3 million and $13.3 million, respectively. For the six months ended June 30, 2019 and 2018, we recorded income tax expense of $11.2 million and $16.4 million, respectively.