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Earnings Per Share (Tables)
 6 Months Ended
Jun. 30, 2019
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted
The following table sets forth the computation of the basic and diluted earnings per share for the three and six months ended June 30, 2018 and 2019 (in thousands, except per share data):
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2018
 
2019
 
2018
 
2019
Numerator for basic and diluted earnings per share:
 
 
 
 
 
 
 
Net income
$
2,747

 
$
4,862

 
$
12,103

 
$
11,387

Less: Earnings allocated to unvested restricted stock
(14
)
 
(21
)
 
(67
)
 
(52
)
Income attributable to common stockholders
$
2,733

 
$
4,841

 
$
12,036

 
$
11,335

 
 
 
 
 
 
 
 
Denominator:
 
 
 
 
 
 
 
Denominator for basic earnings per common share - weighted average shares outstanding
17,916

 
17,959

 
17,010

 
18,008

Effect of dilutive securities:
 
 
 
 
 
 
 
Stock options
212

 
29

 
240

 
35

Convertible Notes
117

 
—

 
674

 
—

Denominator for diluted earnings per common share - weighted average shares outstanding
18,245

 
17,988

 
17,924

 
18,043

 
 
 
 
 
 
 
 
Basic earnings per common share:
$
0.15

 
$
0.27

 
$
0.71

 
$
0.63

Diluted earnings per common share:
$
0.15

 
$
0.27

 
$
0.67

 
$
0.63