Income Tax Provision

6 Months Ended

Jun. 30, 2015

Income Tax Disclosure [Abstract]

Income Tax Provision

(5) Income Tax Provision

For the three months and six months ended June 30, 2015, we had an effective income tax rate of 36.8% compared to an effective income tax rate of 37.0% and 38.1% for the three and six months ended months June30, 2014, respectively. The effective income tax rates for the periods presented were different from the statutory United States federal income tax rate of 35% primarily due to state income taxes, non-deductible share-based compensation expense, the qualified manufacturing activities deduction, and non-deductible meals and entertainment costs.

We made federal and state tax payments of $18.3 million during the six months ended June 30, 2015 compared to $8.6 million in net payments for the same period in the prior year.