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Net Income Per Share (Tables)
 9 Months Ended
Sep. 30, 2018
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, 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