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Net Income (Loss) Per Share (Tables)
 3 Months Ended
Mar. 31, 2015
Earnings Per Share [Abstract]  
Computation of Net Income Per Share
The following table sets forth the computation of Net Income (Loss) Per Share for the three-month periods ended March 31, 2015 and 2014 (in thousands, except per share data):
 
Three Months Ended 
 March 31,
 
2015
 
2014
Numerator for Basic and Diluted Earnings Per Share -
 
 
 
Net Income (Loss)
$
(169,748
)
 
$
660,928

Denominator for Basic Earnings Per Share -
 

 
 

Weighted Average Shares
544,998

 
542,278

Potential Dilutive Common Shares -
 

 
 

Stock Options/SARs
—

 
2,426

Restricted Stock/Units and Performance Units/Stock
—

 
3,367

Denominator for Diluted Earnings Per Share -
 

 
 

Adjusted Diluted Weighted Average Shares
544,998

 
548,071

Net Income (Loss) Per Share
 

 
 

Basic
$
(0.31
)
 
$
1.22

Diluted
$
(0.31
)
 
$
1.21