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Income Taxes (Tables)
 6 Months Ended
Jun. 30, 2013
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
  
Six Months Ended
 
 
 
June 30,
  
June 30,
 
 
 
2013
  
2012
  
2013
  
2012
 
 
 
(In thousands)
 
 
 
  
  
  
 
Tax provision (benefit) before valuation allowance
 
$
4,472
  
$
(101,367
)
 
$
(17,118
)
 
$
(107,429
)
Change in valuation allowance
  
(3,482
)
  
98,476
   
19,247
   
105,901
 
 
                
Provision for (benefit from) income taxes
 
$
990
  
$
(2,891
)
 
$
2,129
  
$
(1,528
)