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Net Income Per Share (Tables)
 9 Months Ended
Sep. 30, 2019
Earnings Per Share [Abstract]  
Computation of 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, 2019 and 2018 (in thousands, except per share data):
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
2019
 
2018
 
2019
 
2018
Numerator for Basic and Diluted Earnings Per Share -
 
 
 
 
 
 
 
Net Income
$
615,122

 
$
1,190,952

 
$
2,098,389

 
$
2,526,272

Denominator for Basic Earnings Per Share -
 

 
 

 
 

 
 

Weighted Average Shares
577,839

 
577,254

 
577,498

 
576,431

Potential Dilutive Common Shares -
 

 
 

 
 

 
 

Stock Options/SARs
203

 
1,432

 
371

 
1,317

Restricted Stock/Units and Performance Units
3,229

 
2,873

 
3,321

 
2,694

Denominator for Diluted Earnings Per Share -
 

 
 

 
 

 
 

Adjusted Diluted Weighted Average Shares
581,271

 
581,559

 
581,190

 
580,442

Net Income Per Share
 

 
 

 
 

 
 

Basic
$
1.06

 
$
2.06

 
$
3.63

 
$
4.38

Diluted
$
1.06

 
$
2.05

 
$
3.61

 
$
4.35