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Earnings Per Share
 9 Months Ended
Sep. 30, 2017
Earnings Per Share [Abstract]  
Earnings per share
Earnings Per Share

The details of the computation of basic and diluted earnings per common share are as follows:

 
Three Months Ended September 30,
 
Nine Months Ended September 30,
(dollars in thousands, except for per share data)
2017
 
2016
 
2017
 
2016
Net income
$
53,137

 
$
21,482

 
$
139,909

 
$
95,439

 
 
 
 
 
 
 
 
Basic weighted average number of shares outstanding
196,121,691

 
196,445,684

 
196,577,436

 
196,311,529

Dilutive effect of stock options and RSUs
2,537,768

 
3,006,624

 
2,681,324

 
2,978,488

Diluted weighted average number of shares outstanding
198,659,459

 
199,452,308

 
199,258,760

 
199,290,017

 
 
 
 
 
 
 
 
Basic net income per common share
$
0.27

 
$
0.11

 
$
0.71

 
$
0.49

Diluted net income per common share
$
0.27

 
$
0.11

 
$
0.70

 
$
0.48

Anti-dilutive shares excluded from diluted earnings per share computation
606,903

 
385,861

 
486,008

 
407,845