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Net Income (Loss) Per Share (Tables)
12 Months Ended
Dec. 31, 2015
Earnings Per Share [Abstract]  
Computation of Net Income (Loss) Per Share
The following table sets forth the computation of Net Income (Loss) Per Share for the years ended December 31, 2015, 2014 and 2013 (in thousands, except per share data):
 
2015
 
2014
 
2013
Numerator for Basic and Diluted Earnings per Share -
 
 
 
 
 
Net Income (Loss)
$
(4,524,515
)
 
$
2,915,487

 
$
2,197,109

Denominator for Basic Earnings per Share -
 

 
 

 
 

Weighted Average Shares
545,697

 
543,443

 
540,341

Potential Dilutive Common Shares -
 

 
 

 
 

Stock Options/SARs

 
2,526

 
2,316

Restricted Stock/Units and Performance Units/Stock

 
2,570

 
3,570

Denominator for Diluted Earnings per Share -
 

 
 

 
 

Adjusted Diluted Weighted Average Shares
545,697

 
548,539

 
546,227

Net Income (Loss) Per Share
 

 
 

 
 

Basic
$
(8.29
)
 
$
5.36

 
$
4.07

Diluted
$
(8.29
)
 
$
5.32

 
$
4.02