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Earnings Per Share (Tables)
 9 Months Ended
Sep. 30, 2016
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,
 
2016
 
2015
 
2016
 
2015
Numerator:
 
 
 
 
 
 
 
Net income
$
29,937

 
$
24,464

 
$
90,890

 
$
59,928

Denominator:
 
 
 
 
 
 
 
Weighted-average number of common shares outstanding—basic
201,297,846

 
200,852,072

 
201,188,563

 
200,776,641

Effect of dilutive securities:
 
 
 
 
 
 
 
Unvested restricted common stock
58,115

 
99,873

 
—

 
130,349

Unexercised stock appreciation rights
—

 
—

 
—

 
1,387

Shares related to unvested PSUs
383,643

 
215,714

 
383,643

 
215,714

Weighted-average number of common shares outstanding—diluted
201,739,604

 
201,167,659

 
201,572,206

 
201,124,091

Earnings per share:


 
 
 


 


Basic earnings per share
$
0.15

 
$
0.12

 
$
0.45

 
$
0.30

Diluted earnings per share
$
0.15

 
$
0.12

 
$
0.45

 
$
0.30