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Net Income (Loss) Per Share
 3 Months Ended
Mar. 31, 2017
Earnings Per Share [Abstract]  
Net Income (Loss) Per Share [Text Block]
  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, 2017 and 2016 (in thousands, except per share data):
 
Three Months Ended 
 March 31,
 
2017
 
2016
Numerator for Basic and Diluted Earnings Per Share -
 
 
 
Net Income (Loss)
$
28,517

 
$
(471,776
)
Denominator for Basic Earnings Per Share -
 

 
 

Weighted Average Shares
573,935

 
546,715

Potential Dilutive Common Shares -
 

 
 

Stock Options/SARs
1,871

 
—

Restricted Stock/Units and Performance Units/Stock
2,787

 
—

Denominator for Diluted Earnings Per Share -
 

 
 

Adjusted Diluted Weighted Average Shares
578,593

 
546,715

Net Income (Loss) Per Share
 

 
 

Basic
$
0.05

 
$
(0.86
)
Diluted
$
0.05

 
$
(0.86
)


The diluted earnings per share calculation excludes stock options, SARs, restricted stock and units and performance units that were anti-dilutive. Shares underlying the excluded stock options and SARs totaled 2.0 million and 10.6 million shares for the three months ended March 31, 2017 and 2016, respectively. For the three months ended March 31, 2016, 5.2 million shares of restricted stock, restricted stock units and performance units were excluded.