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Earnings per Share and Unit
 3 Months Ended
Mar. 31, 2018
Earnings per Share and Unit [Abstract]  
Earnings per Share and Unit
Earnings per Share and Unit
Parent Company Earnings per Share
The following summarizes the calculation of basic and diluted earnings per share:
 
 
Three months ended March 31,
(in thousands, except per share data)
 
2018
 
2017
Numerator:
 
 
 
 
Income (loss) from operations attributable to common stockholders - basic
 
$
52,660

 
(33,223
)
Income (loss) from operations attributable to common stockholders - diluted
 
$
52,660

 
(33,223
)
Denominator:
 
 
 
 
Weighted average common shares outstanding for basic EPS
 
170,704

 
126,649

Weighted average common shares outstanding for diluted EPS (1)
 
170,959

 
126,649


 
 
 
 
Income (loss) per common share – basic
 
$
0.31

 
(0.26
)
Income (loss) per common share – diluted
 
$
0.31

 
(0.26
)
(1)  Includes the dilutive impact of unvested restricted stock and shares issuable under the forward equity offering using the treasury stock method.

Income allocated to noncontrolling interests of the Operating Partnership has been excluded from the numerator and exchangeable Operating Partnership units have been omitted from the denominator for the purpose of computing diluted earnings per share since the effect of including these amounts in the numerator and denominator would have no impact. Weighted average exchangeable Operating Partnership units outstanding for the three months ended March 31, 2018 and 2017 were 349,902 and 154,170, respectively.

Operating Partnership Earnings per Unit
The following summarizes the calculation of basic and diluted earnings per unit:
 
 
Three months ended March 31,
(in thousands, except per share data)
 
2018
 
2017
Numerator:
 
 
 
 
Income (loss) from operations attributable to common unit holders - basic
 
$
52,771

 
(33,242
)
Income (loss) from operations attributable to common unit holders - diluted
 
$
52,771

 
(33,242
)
Denominator:
 
 
 
 
Weighted average common units outstanding for basic EPU
 
171,054

 
126,803

Weighted average common units outstanding for diluted EPU (1)
 
171,309

 
126,803


 
 
 
 
Income (loss) per common unit – basic
 
$
0.31

 
(0.26
)
Income (loss) per common unit – diluted
 
$
0.31

 
(0.26
)
(1)  Includes the dilutive impact of unvested restricted stock and the forward equity offering using the treasury stock method.