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Net Income (Loss) Per Share
 3 Months Ended
Mar. 31, 2015
Earnings Per Share [Abstract]  
Net Income Per Share [Text Block]
3.    Net Income (Loss) 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



The diluted earnings per share calculation excludes stock options, SARs, restricted stock and units and performance units and stock that were anti-dilutive. Shares underlying the excluded stock options and SARs totaled 4.2 million and 0.2 million shares for the three months ended March 31, 2015 and 2014, respectively. For the three months ended March 31, 2015, 5.8 million shares of restricted stock and restricted stock units and performance units and performance stock were excluded.