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STOCKHOLDERS' EQUITY AND EARNINGS PER SHARE (Tables)
 3 Months Ended
Mar. 31, 2016
STOCKHOLDERS' EQUITY AND EARNINGS PER SHARE  
Earnings per share calculations
The following table presents EPS calculations for the three months ended March 31, 2016 and 2015:
 
 
 
 
 
 
 
Three Months Ended March 31,
($ in thousands, except per share data, shares in thousands)
 
2016
 
2015
Basic
 
 
 
 
Net income
 
$
107,516

 
$
100,027

Less: Earnings allocated to participating securities
 
—

 
3

Net income allocated to common stockholders
 
$
107,516

 
$
100,024

 
 
 
 
 
Basic weighted average number of shares outstanding
 
143,958

 
143,655

Basic EPS
 
$
0.75

 
$
0.70

 
 
 
 
 
Diluted
 
 
 
 
Net income allocated to diluted common stockholders
 
$
107,516

 
$
100,024

 
 
 
 
 
Basic weighted average number of shares outstanding
 
143,958

 
143,655

Diluted potential common shares (1)
 
845

 
694

Diluted weighted average number of shares outstanding
 
144,803

 
144,349

Diluted EPS
 
$
0.74

 
$
0.69

 
 
 
 
 
(1)
Includes dilutive shares from RSUs and warrants for the three months ended March 31, 2016 and 2015. Also includes dilutive shares from stock options for the three months ended March 31, 2015.