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Total income tax provisions (benefits) were allocated as follows: 

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Signifi cant components of the deferred income tax provision (benefi t) attributable to income from continuing operations before income taxes are as follows: 

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We have recognized that it is more likely than not that certain future tax benefits may not be realized as a result of current and future income. During the year ended December 31, 2010, the valuation allowance was increased by $39.2 million. The increase in the valuation allowance during 2010 was due to recognition of a valuation allowance in our Spanish legal entity, predominantly due to the Huelva facility 

Significant components of our deferred tax assets and liabilities were attributable to: 

shutdown, for tax losses that are not expected to be fully recoverable in future years from the earnings of the remaining businesses in that entity. During the year ended December 31, 2009, we reduced the valuation allowance related to domestic operations by $18.2 million because of our expectation that the related deferred tax assets were likely to be realized. 

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We believe that it is more likely than not that future earnings will generate suffi cient taxable income to utilize the net deferred tax assets recorded as of December 31, 2010. 

At December 31, 2010, we had net operating loss and tax credit carryforwards as follows: U.S. state net operating loss carryforwards of $823.5 million expiring in various amounts and years through 2029, foreign net operating loss carryforwards of $271.8 million 

expiring in various years, U.S. foreign tax credit carryforwards of $32.0 million expiring in various amounts and years through 2019, and alternative minimum tax credit carryforwards of $54.1 million with no expiration date. 

