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Income Taxes (Tables)
 3 Months Ended
Mar. 31, 2015
Income Taxes [Abstract]  
Tax provision (benefit)
The effect of the change in valuation allowance on the provision for income taxes was as follows:

  
Three months ended March 31,
 
  
2015
  
2014
 
  
(In thousands)
 
     
Provision for income tax
 
$
47,883
  
$
23,120
 
Change in valuation allowance
  
(44,498
)
  
(22,394
)
         
Provision for income taxes
 
$
3,385
  
$
726