Quarterly report pursuant to Section 13 or 15(d)

Income Taxes

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Income Taxes
3 Months Ended
Mar. 31, 2016
Income Tax Disclosure [Abstract]  
Income Taxes
Income Taxes
We make estimates and judgments in determining our provision for income taxes for financial statement purposes. These estimates and judgments occur in the calculation of certain tax assets and liabilities, which arise from differences in the timing of recognition of revenue and expense for tax and financial statement purposes.
Our provision for income taxes in interim periods is based on our estimated annual effective tax rate. We record cumulative adjustments in the quarter in which a change in the estimated annual effective rate is determined. The estimated annual effective tax rate calculation does not include the effect of discrete events that may occur during the year. The effect of these events, if any, is recorded in the quarter in which the event occurs.
Our effective income tax rate was 41.4% and 51.4% for the three months ended March 31, 2016 and 2015, respectively. Our effective rates are higher than the statutory rate primarily because of state income taxes and non-deductible expenses.