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Income Taxes	9 Months Ended
Sep. 30, 2013
Income Taxes	(5) Income Taxes The effective tax rate for the third quarter of 2013 was 30.4 percent, compared with 28.0 percent for the third quarter of 2012. The effective tax rate for the first nine months of 2013 was 32.0 percent, compared with 32.2 percent for the first nine months of 2012. The effective tax rates for the third quarter and first nine months of 2013 benefited from the extension of the federal research tax credit provisions included in the American Taxpayer Relief Act of 2012, which was signed into law on January 2, 2013. The effective tax rates for the third quarter and first nine months of 2012 benefited from a favorable adjustment to an uncertain tax position related to income tax credits claimed for research and development following the conclusion, in September 2012, of an Internal Revenue Service examination of our United States federal income tax returns for 2006, 2007 and 2008. We expect the effective tax rate for the remainder of 2013 to be approximately 34.0 percent.

Income Taxes

9 Months Ended

Sep. 30, 2013

(5) Income Taxes

The effective tax rate for the third quarter of 2013 was 30.4 percent, compared with 28.0 percent for the third quarter of 2012. The effective tax rate for the first nine months of 2013 was 32.0 percent, compared with 32.2 percent for the first nine months of 2012. The effective tax rates for the third quarter and first nine months of 2013 benefited from the extension of the federal research tax credit provisions included in the American Taxpayer Relief Act of 2012, which was signed into law on January 2, 2013. The effective tax rates for the third quarter and first nine months of 2012 benefited from a favorable adjustment to an uncertain tax position related to income tax credits claimed for research and development following the conclusion, in September 2012, of an Internal Revenue Service examination of our United States federal income tax returns for 2006, 2007 and 2008. We expect the effective tax rate for the remainder of 2013 to be approximately 34.0 percent.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

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