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Income Taxes
3 Months Ended
Mar. 31, 2014
Income Taxes [Abstract]  
Income Taxes
Income Taxes
Our effective tax rate for the three months ended March 31, 2014 and 2013 was 33.8% and 33.0%, respectively.
At March 31, 2014, our unrecognized tax benefits were $133.7 million. Of this amount, approximately $57.6 million would affect our effective tax rate upon resolution of the uncertain tax positions.