Income Taxes	9 Months Ended
Sep. 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 nine months ended September 30, 2013, our effective tax rate was 29.7% and 25.9% respectively, compared with 40.4% and 31.7% for the same periods in 2012. The effective tax rate for the nine months ended September 30, 2012 reflects the nondeductibility of the purchase premium paid during that period related to the extinguishment of our convertible debt. In addition, the decrease in the effective tax rate for both periods presented reflects the impact of the discrete tax items discussed below. During the three months ended September 30, 2013 and 2012, we recorded discrete tax charges of $1.3 million and $0.8 million, respectively, resulting from the impact of changes in the enacted tax rate in the United Kingdom on our previously-recorded deferred tax balances. In addition, during the third quarter of 2012, as a result of the finalization of estimates of foreign tax credits available with respect to a dividend from one of our foreign subsidiaries, we recorded a discrete tax charge of $1.0 million. The effective tax rate for the nine month periods presented reflects the items 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 nine months ended September 30, 2012, we recorded a $0.3 million discrete tax charge 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 $2.1 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 September 30, 2013 and December 31, 2012, respectively.

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 nine months ended September 30, 2013, our effective tax rate was 29.7% and 25.9% respectively, compared with 40.4% and 31.7% for the same periods in 2012. The effective tax rate for the nine months ended September 30, 2012 reflects the nondeductibility of the purchase premium paid during that period related to the extinguishment of our convertible debt. In addition, the decrease in the effective tax rate for both periods presented reflects the impact of the discrete tax items discussed below.

During the three months ended September 30, 2013 and 2012, we recorded discrete tax charges of $1.3 million and $0.8 million, respectively, resulting from the impact of changes in the enacted tax rate in the United Kingdom on our previously-recorded deferred tax balances. In addition, during the third quarter of 2012, as a result of the finalization of estimates of foreign tax credits available with respect to a dividend from one of our foreign subsidiaries, we recorded a discrete tax charge of $1.0 million.

The effective tax rate for the nine month periods presented reflects the items 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 nine months ended September 30, 2012, we recorded a $0.3 million discrete tax charge 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 $2.1 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 September 30, 2013 and December 31, 2012, respectively.