Quarterly report pursuant to Section 13 or 15(d)

Income Taxes Income Taxes

Income Taxes Income Taxes
6 Months Ended
Jun. 30, 2014
Income Tax Disclosure [Abstract]  
Income Taxes
Note 3. Income Taxes

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.  For the three and six months ended June 30, 2014, our effective tax rate was 39.0% and 39.6%, respectively, as compared to 38.6% and 37.6% for the same periods in 2013, respectively. The increase in our effective tax rate was primarily due to the expiration of favorable tax credits for the use of alternative fuels provided by the American Taxpayer Relief Act of 2012 enacted in the first quarter of 2013.