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Income Taxes
6 Months Ended
Jun. 30, 2012
Income Tax Disclosure [Abstract]  
Income Taxes
Income Taxes. Our overall effective tax rate for the three months ended June 30, 2012 was 30.8% compared to 35.3% for the corresponding period of 2011.  For the six months ended June 30, 2012, our effective tax rate was 29.2%, compared to 33.8% for the corresponding period of 2011.  The decrease in the effective tax rate for the three and six-month periods ended June 30, 2012, when compared to the corresponding periods of 2011, was primarily related to the fact that our foreign operations (primarily our Irish operations), which are taxed at a lower rate than our U.S. operations, made up a greater portion of our consolidated pre-tax income during the three and six-month periods ended June 30, 2012, compared to the corresponding periods of 2011.