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Income Taxes
3 Months Ended
Mar. 31, 2012
Income Taxes  
Income Taxes
Income Taxes
During the three months ended March 31, 2012 and 2011, the Company's provision for federal income taxes was reduced by a partial reversal of the valuation allowance on the Company's federal deferred tax assets, as a result of utilizing net operating losses that previously had a full valuation allowance. For the three months ended March 31, 2012 and 2011, the effective tax rate differed from the federal statutory rate predominately due to the Company's federal deferred tax valuation allowances. The Company expects to reverse up to $100 million of its federal valuation allowance as an income tax benefit in the second quarter of 2012 due to the NextG acquisition. See note 14.