Quarterly report pursuant to Section 13 or 15(d)

Income Taxes Income Taxes

Income Taxes Income Taxes
6 Months Ended
Jun. 30, 2013
Income Tax Disclosure [Abstract]  
Income Taxes
Note 3. Income Taxes

Our effective tax rate for the three and six months ended June 30, 2013 was 38.6% and 37.6%, respectively, as compared to 39.5% for both comparable periods of 2012. On January 2, 2013, Congress enacted the American Taxpayer Relief Act of 2012, which reinstated alternative fuel tax credits that previously expired on December 31, 2011 and extended those credits until December 31, 2013. As a result, our first quarter of 2013 tax rate included the favorable impact of a discrete tax adjustment of $1.6 million for the full amount of credits related to our use of alternative fuel in 2012. Additionally, our year-to-date effective tax rate in 2013 benefited from the discrete item above and the extension of those credits until December 31, 2013. Our effective tax rate generally exceeds the federal statutory rate of 35% due to the impact of state taxes, and, to a lesser extent, certain other non-deductible items.