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Income Taxes (Tables)
 3 Months Ended
Mar. 31, 2014
Income Taxes [Abstract]  
Tax provision (benefit)
The effect of the change in valuation allowance on the provision for (benefit from) income taxes was as follows:

 
 
Three Months Ended
 
 
 
March 31,
 
 
 
2014
  
2013
 
 
 
(In thousands)
 
 
 
  
 
Provision for (benefit from) income tax
 
$
23,120
  
$
(21,590
)
Change in valuation allowance
  
(22,394
)
  
22,729
 
 
        
Provision for income taxes
 
$
726
  
$
1,139