Quarterly report pursuant to Section 13 or 15(d)

Income Taxes

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Income Taxes
6 Months Ended
Jun. 30, 2015
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 23.5% and 24.7% for the six months ended June 30, 2015 and 2014, respectively.
In July 2015, the Company filed amended 2013 and 2012 income tax returns for selected states to correct certain items that were improperly deducted, as determined by the Company subsequent to the initial filings. The primary effect of the amended returns was an immaterial increase in our current state income tax liability and a reduction of our state net operating loss deferred tax asset, net of federal benefit, of approximately $0.7 million at December 31, 2014.