Income Taxes	9 Months Ended
Sep. 30, 2012
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, 2012, our effective tax rate was 40.4% and 31.7% respectively, compared with 30.0% and 25.7% for the same periods in 2011. The increase in the effective tax rate for both periods presented primarily reflects changes in our geographic mix of earnings and the impact of the discrete tax items discussed below. In addition, the increase in the rate for the nine months ended September 30, 2012 also reflects the nondeductibility of the purchase premium paid in the second quarter of 2012 related to the extinguishment of our convertible debt. 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 reduced our foreign tax credit deferred tax asset by $1.0 million. We also recorded a discrete tax charge of $0.8 million resulting from the impact of a change in the U.K. enacted tax rate on our deferred tax balances. In addition, during the first quarter of 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. During the three and nine months ended September 30, 2011, we recorded discrete tax charges of $0.7 million and $0.8 million, respectively, primarily resulting from the impact of changes in tax rates in certain foreign tax jurisdictions on our deferred tax balances. 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 2011, the statute of limitations for the 2007 U.S. federal tax year lapsed, leaving tax years 2008 through 2011 open to examination. For U.S. state and local jurisdictions, tax years 2007 through 2011 are open to examination. We are also subject to examination in various foreign jurisdictions for tax years 2005 through 2011. 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 $0.8 million during the next twelve months, which would favorably impact our effective tax rate. Accrued interest and penalties related to unrecognized tax benefits was $0.5 million and $0.4 million at September 30, 2012 and December 31, 2011, respectively.

Income Taxes

9 Months Ended

Sep. 30, 2012

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, 2012, our effective tax rate was 40.4% and 31.7% respectively, compared with 30.0% and 25.7% for the same periods in 2011. The increase in the effective tax rate for both periods presented primarily reflects changes in our geographic mix of earnings and the impact of the discrete tax items discussed below. In addition, the increase in the rate for the nine months ended September 30, 2012 also reflects the nondeductibility of the purchase premium paid in the second quarter of 2012 related to the extinguishment of our convertible debt.

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 reduced our foreign tax credit deferred tax asset by $1.0 million. We also recorded a discrete tax charge of $0.8 million resulting from the impact of a change in the U.K. enacted tax rate on our deferred tax balances. In addition, during the first quarter of 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. During the three and nine months ended September 30, 2011, we recorded discrete tax charges of $0.7 million and $0.8 million, respectively, primarily resulting from the impact of changes in tax rates in certain foreign tax jurisdictions on our deferred tax balances.

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 2011, the statute of limitations for the 2007 U.S. federal tax year lapsed, leaving tax years 2008 through 2011 open to examination. For U.S. state and local jurisdictions, tax years 2007 through 2011 are open to examination. We are also subject to examination in various foreign jurisdictions for tax years 2005 through 2011.

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 $0.8 million during the next twelve months, which would favorably impact our effective tax rate. Accrued interest and penalties related to unrecognized tax benefits was $0.5 million and $0.4 million at September 30, 2012 and December 31, 2011, respectively.