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Earnings Per Share (Tables)
 3 Months Ended
Mar. 31, 2016
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 months ended March 31, 2015 and 2016 (in thousands, except per share data):
 
For the Three Months Ended March 31,
 
2015
 
2016
Numerator for basic and diluted earnings per share:
 
 
 
Net income
$
6,418

 
$
4,571

Less: Earnings allocated to unvested restricted stock
(100
)
 
(41
)
Income attributable to common stockholders
$
6,318

 
$
4,530

 
 
 
 
Denominator:
 
 
 
Denominator for basic earnings per common share - weighted average shares outstanding
18,208

 
16,459

Effect of dilutive securities:
 
 
 
Stock options
248

 
191

Convertible subordinated notes
348

 
—

Denominator for diluted earnings per common share - weighted average shares outstanding
18,804

 
16,650

 
 
 
 
Basic earnings per common share:
 
 
 
Basic earnings per common share:
$
0.35

 
$
0.27

Diluted earnings per common share:
$
0.34

 
$
0.27