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Net Income Per Share (Notes)
 9 Months Ended
Sep. 30, 2018
Earnings Per Share [Abstract]  
Net Income Per Share
  Net Income Per Share

The following table sets forth the computation of Net Income Per Share for the three-month and nine-month periods ended September 30, 2018 and 2017 (in thousands, except per share data):
 
Three Months Ended 
 September 30,
 
Nine Months Ended 
 September 30,
 
2018
 
2017
 
2018
 
2017
Numerator for Basic and Diluted Earnings Per Share -
 
 
 
 
 
 
 
Net Income
$
1,190,952

 
$
100,541

 
$
2,526,272

 
$
152,111

Denominator for Basic Earnings Per Share -
 

 
 

 
 

 
 

Weighted Average Shares
577,254

 
574,783

 
576,431

 
574,370

Potential Dilutive Common Shares -
 

 
 

 
 

 
 

Stock Options/SARs
1,432

 
1,451

 
1,317

 
1,518

Restricted Stock/Units and Performance Units/Stock
2,873

 
2,502

 
2,694

 
2,565

Denominator for Diluted Earnings Per Share -
 

 
 

 
 

 
 

Adjusted Diluted Weighted Average Shares
581,559

 
578,736

 
580,442

 
578,453

Net Income Per Share
 

 
 

 
 

 
 

Basic
$
2.06

 
$
0.17

 
$
4.38

 
$
0.26

Diluted
$
2.05

 
$
0.17

 
$
4.35

 
$
0.26



The diluted earnings per share calculation excludes stock options and SARs that were anti-dilutive. Shares underlying the excluded stock options and SARs were 0.5 million and 4.2 million shares for the three months ended September 30, 2018 and 2017, respectively, and were 0.2 million and 3.6 million shares, respectively, for the nine months ended September 30, 2018 and 2017, respectively.