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Earnings (Loss) Per Share (Tables)
 12 Months Ended
Dec. 31, 2013
Earnings (Loss) Per Share [Abstract]  
Reconciliation of the numerator and denominator of basic and diluted earnings (loss) per share
The following is a reconciliation of the numerator and denominator of basic and diluted earnings (loss) per share for the years ended December 31, 2013, 2012, and 2011:

 
(In thousands except per share data)
 
Year Ended December 31,
 
Numerator:
 
2013
  
2012
  
2011
 
Net income (loss)
 
$
(8,541
)
 
$
8,024
  
$
(157,693
)
 
            
Denominator:
            
Shares used for basic earnings (loss) per share
  
34,489
   
33,597
   
33,677
 
Effect of dilutive stock options and restricted stock units outstanding:
            
Non-qualified stock options (1)
  
—
   
37
   
—
 
Restricted stock units (1)
  
—
   
202
   
—
 
Shares used for diluted earnings (loss) per share (1)
  
34,489
   
33,836
   
33,677
 
 
            
Earnings per share:
            
Basic
 
$
(0.25
)
 
$
0.24
  
$
(4.68
)
Diluted (1)
 
$
(0.25
)
 
$
0.24
  
$
(4.68
)
 
            
Dilutive securities outstanding not included in the computation of earnings per share because their effect is anti-dilutive:
            
Non-qualified stock options
  
3,234
   
4,926
   
4,845
 
Restricted stock units
  
334
   
193
   
469
 
Warrants related to Cash Convertible Notes
  
7,707
   
—
   
—
 
CareFirst Convertible Note
  
892
   
—
   
—
 
 
(1) The assumed exercise of stock-based compensation awards for the years ended December 31, 2013 and December 31, 2011 was not considered because the impact would be anti-dilutive.