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Earnings Per Share (Tables)
3 Months Ended
Mar. 31, 2018
Earnings Per Share [Abstract]  
Weighted-Average Number of Shares of Common Stock Used to Calculate Basic and Diluted Earnings Per Share

The table below presents the weighted-average number of shares of common stock used to calculate basic and diluted earnings per share:

 

 

 

Three Months Ended

March 31,

 

(in thousands)

 

2018

 

 

2017

 

Weighted-average number of shares of common stock for

   calculating basic earnings per share

 

 

24,067

 

 

 

23,950

 

Effect of potentially dilutive securities from

   equity-based compensation

 

 

411

 

 

 

282

 

Weighted-average number of shares of common stock for

   calculating diluted earnings per share

 

 

24,478

 

 

 

24,232

 

 

 

 

 

 

 

 

 

 

 

Securities Not Included in Computation of Diluted Earnings Per Share

 

The following securities were not included in the computation of diluted earnings per share as their effect would have been anti-dilutive:

 

 

 

Three Months Ended

March 31,

 

(in thousands)

 

2018

 

 

2017

 

Options to purchase shares of common stock

 

 

 

 

 

7