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Earnings Per Share (Tables)
 9 Months Ended
Sep. 30, 2018
Earnings Per Share [Abstract]  
Computation of reconciliation of basic earnings per share to diluted earnings per share
The following table details the reconciliation of basic earnings per share to diluted earnings per share:
 
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
 
2018
 
2017
 
2018
 
2017
 
 
 
 
As Adjusted
 
 
 
As Adjusted
Numerator for basic and diluted earnings per share:
 
 
 
 
 
 
 
 
Net income
 
$
38,924

 
$
38,836

 
$
115,910

 
$
103,375

Denominator:
 
 

 
 

 


 


Weighted-average basic common shares outstanding
 
38,761

 
37,391

 
38,533

 
37,238

Assumed conversion of dilutive securities:
 
 
 
 
 

 

Stock options
 
1,767

 
1,951

 
1,812

 
2,028

Denominator for diluted earnings per share
   - Adjusted weighted-average shares
 
40,528

 
39,342

 
40,345

 
39,266

Earnings per common share:
 
 

 
 

 


 


Basic
 
$
1.00

 
$
1.04

 
$
3.01

 
$
2.78

Diluted
 
$
0.96

 
$
0.99

 
$
2.87

 
$
2.63