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Earnings Per Share (Tables)
 6 Months Ended
Jun. 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 June 30,
 
Six Months Ended June 30,
 
2018
 
2017
 
2018
 
2017
Numerator:
 
 
 
 
 
 
 
Net income
$
28,009

 
$
36,595

 
$
32,347

 
$
45,482

Denominator:
 
 
 
 
 
 
 
Weighted-average number of common shares outstanding—basic
203,574,282

 
200,810,323

 
202,366,359

 
200,732,639

Effect of dilutive securities:
 
 
 
 
 
 
 
Unvested restricted common stock
148,608

 
99,677

 
207,279

 
165,483

Shares related to unvested PSUs
793,252

 
831,394

 
793,252

 
831,394

Weighted-average number of common shares outstanding—diluted
204,516,142

 
201,741,394

 
203,366,890

 
201,729,516

Earnings per share:


 
 
 


 


Basic earnings per share
$
0.14

 
$
0.18

 
$
0.16

 
$
0.23

Diluted earnings per share
$
0.14

 
$
0.18

 
$
0.16

 
$
0.23