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Earnings Per Share (Tables)
 3 Months Ended
Mar. 31, 2019
Earnings Per Share [Abstract]  
Schedule of Dilutive Effect of Stock Options RSUs and PSAs

The dilutive effect of stock options, RSUs, and PSAs for each period reported is summarized below:

 

 

Three Months Ended

 

 

March 31,

 

 

2019

 

 

2018

 

Net Income

$

15,318

 

 

$

12,417

 

 

 

 

 

 

 

 

 

Weighted-average number of basic shares outstanding during the

   period

 

18,825

 

 

 

18,670

 

Dilutive effect of stock options, RSUs, and performance shares

 

438

 

 

 

488

 

Weighted-average number of diluted shares outstanding during the

   period

 

19,263

 

 

 

19,158

 

 

 

 

 

 

 

 

 

Basic earnings per share

$

0.81

 

 

$

0.67

 

Diluted earnings per share

$

0.80

 

 

$

0.65