Income Taxes	6 Months Ended
Jun. 30, 2013
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The tax provision for interim periods is determined using the estimated annual effective consolidated tax rate, based on the current estimate of full-year earnings before taxes, adjusted for the impact of discrete quarterly items. For the three and six months ended June 30, 2013, our effective tax rate was 26.5% and 24.2% respectively, compared with 32.7% and 28.4% for the same periods in 2012. The decrease in the effective tax rate for the three month periods presented reflects the nondeductibility of the purchase premium paid related to the extinguishment of our convertible debt during the second quarter of 2012. The decrease in the effective tax rate for the six month periods presented reflects the item mentioned above, as well as a $1.3 million discrete tax benefit related to the American Taxpayers Relief Act of 2012, which was signed into law in January 2013 and includes a retroactive reinstatement of the research and development tax credit to January 1, 2012. In addition, during the six months ended June 30, 2012, we recorded a $0.3 million reduction of our deferred tax assets associated with the legal restructuring of the ownership of our Puerto Rico operations. Because we are a global organization, we and our subsidiaries file income tax returns in the U.S. federal jurisdiction and various state and foreign jurisdictions. During 2012, the statute of limitations for the 2008 U.S. federal tax year lapsed, leaving tax years 2009 through 2012 open to examination. For U.S. state and local jurisdictions, tax years 2007 through 2012 are open to examination. We are also subject to examination in various foreign jurisdictions for tax years 2006 through 2012. It is reasonably possible that, due to the expiration of statutes and the closing of tax audits, the liability for unrecognized tax benefits may be reduced by approximately $2.0 million during the next twelve months, which would favorably impact our effective tax rate. Accrued interest and penalties related to unrecognized tax benefits was $0.6 million and $0.5 million at June 30, 2013 and December 31, 2012, respectively.

Income Taxes

6 Months Ended

Jun. 30, 2013

The tax provision for interim periods is determined using the estimated annual effective consolidated tax rate, based on the current estimate of full-year earnings before taxes, adjusted for the impact of discrete quarterly items. For the three and six months ended June 30, 2013, our effective tax rate was 26.5% and 24.2% respectively, compared with 32.7% and 28.4% for the same periods in 2012.

The decrease in the effective tax rate for the three month periods presented reflects the nondeductibility of the purchase premium paid related to the extinguishment of our convertible debt during the second quarter of 2012.

The decrease in the effective tax rate for the six month periods presented reflects the item mentioned above, as well as a $1.3 million discrete tax benefit related to the American Taxpayers Relief Act of 2012, which was signed into law in January 2013 and includes a retroactive reinstatement of the research and development tax credit to January 1, 2012. In addition, during the six months ended June 30, 2012, we recorded a $0.3 million reduction of our deferred tax assets associated with the legal restructuring of the ownership of our Puerto Rico operations.

Because we are a global organization, we and our subsidiaries file income tax returns in the U.S. federal jurisdiction and various state and foreign jurisdictions. During 2012, the statute of limitations for the 2008 U.S. federal tax year lapsed, leaving tax years 2009 through 2012 open to examination. For U.S. state and local jurisdictions, tax years 2007 through 2012 are open to examination. We are also subject to examination in various foreign jurisdictions for tax years 2006 through 2012.

It is reasonably possible that, due to the expiration of statutes and the closing of tax audits, the liability for unrecognized tax benefits may be reduced by approximately $2.0 million during the next twelve months, which would favorably impact our effective tax rate. Accrued interest and penalties related to unrecognized tax benefits was $0.6 million and $0.5 million at June 30, 2013 and December 31, 2012, respectively.