Earnings Per Share
 9 Months Ended
Sep. 30, 2015
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)
 
2015
 
2014
 
 
2015
 
2014
 
 
 
 
 
 
 
 
 
 
Net income
 
$
27,066

 
$
27,713

 
 
$
79,750

 
$
80,777

 
 
 
 
 
 
 
 
 
 
Basic weighted average number of shares outstanding
 
196,062,348

 
195,743,154

 
 
195,852,404

 
195,732,663

Dilutive effect of stock options
 
2,192,460

 
2,140,875

 
 
2,176,139

 
2,087,479

Diluted weighted average number of shares outstanding
 
198,254,808

 
197,884,029

 
 
198,028,543

 
197,820,142

 
 
 
 
 
 
 
 
 
 
Basic net income per common share
 
$
0.14

 
$
0.14

 
 
$
0.41

 
$
0.41

Diluted net income per common share
 
$
0.14

 
$
0.14

 
 
$
0.40

 
$
0.41

 
 
 
 
 
 
 
 
 
 


For the three and nine months ended September 30, 2015, there were 86,733 and 29,229 shares, respectively, that were excluded from the computation of weighted average shares for diluted earnings per share due to their anti-dilutive effect. For the three and nine months ended September 30, 2014, there were no shares that were excluded from the computation of weighted average shares for diluted earnings per share due to their anti-dilutive effect.