Income Tax Provision

3 Months Ended

Mar. 31, 2016

Income Tax Disclosure [Abstract]

Income Tax Provision

(6) Income Tax Provision

For the three months ended March 31, 2016 and March 31, 2015, we had effective income tax rates of 38.1% and 36.9%, respectively. The effective income tax rates for the periods presented were different from the statutory United States federal income tax rate of 35% principally due to state income taxes, non-deductible share-based compensation expense, the qualified manufacturing activities deduction, disqualifying incentive stock option dispositions and non-deductible meals and entertainment costs.

We made tax payments of $71,000 and $1.5 million in the three months ended March 31, 2016 and March 31, 2015, respectively.