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Earnings Per Share (Tables)
 9 Months Ended
Sep. 30, 2018
Earnings Per Share [Abstract]  
Schedule of earnings (loss) per share, basic and diluted
The following is a reconciliation of the calculation of basic and diluted earnings per share (in thousands, except share and per share data):
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
2018
 
2017
 
2018
 
2017
Numerator:
 
 
 
 
 
 
 
Net income
$
31,443

 
$
21,623

 
$
63,790

 
$
67,105

Denominator:
 
 
 
 
 
 
 
Weighted-average number of common shares outstanding—basic
208,758,945

 
200,834,910

 
204,520,637

 
200,767,104

Effect of dilutive securities:
 
 
 
 
 
 
 
Unvested restricted common stock
221,018

 
173,557

 
212,051

 
170,612

Shares related to unvested PSUs
617,074

 
415,933

 
617,074

 
415,933

Weighted-average number of common shares outstanding—diluted
209,597,037

 
201,424,400

 
205,349,762

 
201,353,649

Earnings per share:


 
 
 


 


Basic earnings per share
$
0.15

 
$
0.11

 
$
0.31

 
$
0.33

Diluted earnings per share
$
0.15

 
$
0.11

 
$
0.31

 
$
0.33