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Earnings Per Share
 6 Months Ended
Jun. 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 June 30,
 
Six Months Ended June 30,
(dollars in thousands, except for per share data)
2017
 
2016
 
2017
 
2016
Net income
$
42,682

 
$
36,624

 
$
86,772

 
$
73,957

 
 
 
 
 
 
 
 
Basic weighted average number of shares outstanding
196,994,210

 
196,270,119

 
196,809,085

 
196,243,714

Dilutive effect of stock options and RSUs
2,624,599

 
2,171,196

 
2,763,362

 
2,080,292

Diluted weighted average number of shares outstanding
199,618,809

 
198,441,315

 
199,572,447

 
198,324,006

 
 
 
 
 
 
 
 
Basic net income per common share
$
0.22

 
$
0.19

 
$
0.44

 
$
0.38

Diluted net income per common share
$
0.21

 
$
0.18

 
$
0.43

 
$
0.37

Anti-dilutive shares excluded from diluted earnings per share computation
608,054

 
375,688

 
424,559

 
288,284