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Income Taxes
 6 Months Ended
Jun. 30, 2012
Income Taxes [Abstract]  
Income Taxes
(8)
Income Taxes
 
The Company's effective tax rate for the six months ended June 30, 2012 and 2011 was 3.9% and 36.5%, respectively. The effective tax rate for the six months ended June 30, 2012 excludes $3.6 million of certain discrete expense items related to an increase in unrecognized tax benefits and an adjustment, both associated with certain stock-based compensation items identified in March 2012. The Company's provision for income taxes and effective tax rate for the six months ended June 30, 2012 were significantly impacted by the goodwill and intangible asset impairment charge discussed in Note 6 above. Of the total goodwill and intangible asset impairment charge of $376.6 million, approximately $255.0 million pertained to goodwill or intangible assets that yielded permanent differences between book income and taxable income. The Company has tax affected the impairment charge for the current period based on its estimated annual effective tax rate of 3.9%, which resulted in a reduction of its provision for income taxes of approximately $20.7 million during the period. Additionally, approximately $47.7 million was recorded as a reduction in previously recorded deferred tax liabilities due to the impairment charge.

For financial statement purposes the Company uses the more-likely-than-not recognition threshold and a tax benefit measurement process for recording changes to unrecognized tax benefits. The Company recognizes interest and penalties on any income tax liabilities as a component of its income tax provision. The total amount of gross unrecognized tax benefits recorded was approximately $2.9 million and $1.7 million as of June 30, 2012 and December 31, 2011, respectively.

The Company's 2010 U.S. Federal tax return is currently being audited by the Internal Revenue Service.