Income Taxes

3 Months Ended

Mar. 31, 2012

Income Tax Disclosure [Abstract]

Income Taxes

Income Taxes

 The effective tax rates of 72.8% and (294.4)%, respectively, for the three months ended March 31, 2012 and March 31, 2011 were determined using an estimated annual effective tax rate and after considering any discrete items for such periods.  Due to a valuation allowance against our U.S. deferred tax assets, the effective tax rate for the three months ended March 31, 2012 does not include the benefit of the current year U.S. tax loss. Income tax expense for the three months ended March 31, 2012 is primarily due to income tax expense in foreign jurisdictions.