Income Taxes	3 Months Ended
Mar. 31, 2017
Income Taxes [Abstract]
Income Taxes	10. 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 2017 estimated annual effective tax rate of 34.4% is driven by our blended federal and state statutory rate of 37.4%, which is partially offset by estimated benefits of 3.0% primarily from additional deductions for tax related to domestic production activities. During the three months ended March 31, 2017, we also recorded a discrete item for excess tax benefits related to share based awards that vested in the first quarter of 2017, which benefited our effective tax rate by 6.7%. For the three months ended March 31, 2017 and 2016, we recorded income tax expense of $3.3 million and $4.4 million, respectively.

Income Taxes

3 Months Ended

Mar. 31, 2017

10. 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 2017 estimated annual effective tax rate of 34.4% is driven by our blended federal and state statutory rate of 37.4%, which is partially offset by estimated benefits of 3.0% primarily from additional deductions for tax related to domestic production activities. During the three months ended March 31, 2017, we also recorded a discrete item for excess tax benefits related to share based awards that vested in the first quarter of 2017, which benefited our effective tax rate by 6.7%.

For the three months ended March 31, 2017 and 2016, we recorded income tax expense of $3.3 million and $4.4 million, respectively.