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Stockholders' Equity and Earnings Per Share (Tables)
 3 Months Ended
Mar. 31, 2017
Stockholders' Equity and Earnings Per Share [Abstract]  
Schedule of earnings per share calculations
The following table presents the EPS calculations for the three months ended March 31, 2017 and 2016:
 
 
 
 
 
 
 
Three Months Ended
March 31,
($ and shares in thousands, except per share data)
 
2017
 
2016
Basic
 
 
 
 
Net income
 
$
169,736

 
$
107,516

 
 
 
 
 
Basic weighted average number of shares outstanding
 
144,249

 
143,958

Basic EPS
 
$
1.18

 
$
0.75

 
 
 
 
 
Diluted
 
 
 
 
Net income
 
$
169,736

 
$
107,516

 
 
 
 
 
Basic weighted average number of shares outstanding
 
144,249

 
143,958

Diluted potential common shares (1)
 
1,483

 
845

Diluted weighted average number of shares outstanding
 
145,732

 
144,803

Diluted EPS
 
$
1.16

 
$
0.74

 
 
 
 
 
(1)
Includes dilutive shares from RSUs and warrants for the three months ended March 31, 2017 and 2016.