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Computation of Earnings Per Share (Tables)
 9 Months Ended
Sep. 30, 2018
Earnings Per Share [Abstract]  
Calculation of Basic and Diluted Earnings Per Share

The calculation of basic and diluted earnings per share for the three and nine months ended September 30, 2018 and 2017 was as follows:

 

 

 

Three Months Ended September 30

 

 

Nine Months Ended September 30

 

 

 

2018

 

 

2017

 

 

2018

 

 

2017

 

Numerator

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Net income

 

$

9,054

 

 

$

6,278

 

 

$

21,318

 

 

$

11,952

 

Denominator

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Determination of shares

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Weighted-average common shares

   outstanding

 

 

5,025

 

 

 

5,104

 

 

 

5,038

 

 

 

5,113

 

Dilutive effect - share-based awards

 

 

113

 

 

 

16

 

 

 

50

 

 

 

16

 

Diluted weighted-average common shares

   outstanding

 

 

5,138

 

 

 

5,120

 

 

 

5,088

 

 

 

5,129

 

Earnings per common share

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Basic

 

$

1.80

 

 

$

1.23

 

 

$

4.23

 

 

$

2.34

 

Diluted

 

$

1.76

 

 

$

1.23

 

 

$

4.19

 

 

$

2.33