v2.3.0.11
INCOME TAXES
6 Months Ended
Jun. 30, 2011
INCOME TAXES  
INCOME TAXES

14. INCOME TAXES

        Our effective income tax rates for the three and six months ended June 30, 2011 were 15.0 percent and 27.3 percent, respectively, as compared to a benefit of 8.2 percent and 132.1 percent, as reported for the three and six months ended June 30, 2010, respectively. The difference in the rate as compared to the U.S. statutory federal income tax rate in 2011 was primarily due to the release of the valuation allowance that results from utilization of Canadian net operating losses and the resolution of certain uncertain tax positions, and for 2010 was primarily due to a tax benefit from the resolution of uncertain tax positions, offset by the valuation allowance that results from the use of net operating losses in Canada.