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Income Taxes
12 Months Ended
Dec. 31, 2013
Income Tax Disclosure [Abstract]  
Income Taxes
Income Taxes
The effective tax rates were 57% and (11)% for the quarters ended March 31, 2013 and 2012, respectively. The company records income taxes using an estimated annual effective tax rate for interim reporting. Under the annual effective tax rate method, jurisdictions with a projected loss where no tax benefit can be recognized are excluded from the calculation of the estimated annual effective tax rate. The effective tax rates for the quarters ended March 31, 2013 and 2012 were impacted by the mix in earnings among domestic and foreign jurisdictions, losses in various jurisdictions and certain discrete items. Many of these foreign jurisdictions have tax rates that are lower than the U.S. statutory rate, and the company continues to maintain full valuation allowances on net deferred tax assets in certain of these foreign jurisdictions. The effective tax rate for the first quarter of 2013 was also impacted by the company continuing to maintain a full valuation allowance on U.S. net deferred tax assets. In the fourth quarter of 2012, the company recorded a valuation allowance against most of its U.S. federal and state deferred tax assets, which are primarily net operating losses ("NOLs").