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Income (Loss) per Share
 9 Months Ended
Sep. 30, 2016
Earnings Per Share [Abstract]  
Income (Loss) per Share
Income (Loss) per Share
Basic income (loss) per share is calculated using the weighted average number of shares of common stock outstanding during the period. In addition, net income (loss) applicable to participating securities and the related participating securities are excluded from the computation of basic income (loss) per share.
Diluted income (loss) per share is calculated using the weighted average number of shares of common stock outstanding during the period, including restricted stock outstanding and shares contingently issuable under the forward sales agreement. If there is net income during the period, the dilutive impact of common stock equivalents outstanding would also be reflected.
The following table reflects the computation of basic and diluted net income (loss) per share for the three and nine months ended September 30, 2016 and 2015:
IN MILLIONS, except per share amounts
 
 
 
 
 
Three Months Ended September 30, 2016
Three Months Ended September 30, 2015
Nine Months Ended September 30, 2016
Nine Months Ended September 30, 2015

Basic
Diluted
Basic
Diluted
Basic
Diluted
Basic
Diluted
Numerator:
 
 
 
 
 
 
 
 
Net income (loss) attributed to common stockholders
$
4.4

$
4.4

$
(4.6
)
$
(4.6
)
$
19.1

$
19.1

$
(14.4
)
$
(14.4
)
Less: Restricted stock dividends
(0.2
)
(0.2
)
(0.3
)
(0.3
)
(0.5
)
(0.5
)
(0.8
)
(0.8
)
Net income (loss) available to stockholders
$
4.2

$
4.2

$
(4.9
)
$
(4.9
)
$
18.6

$
18.6

$
(15.2
)
$
(15.2
)
Denominator:
 
 
 
 
 
 
 
 
Weighted average common outstanding-basic
80.6

80.6

64.3

64.3

77.0

77.0

50.6

50.6

Performance-based restricted stock(1)
 
0.5

 
—

 
0.6

 
—

Contingently issuable securities(2)
 
0.2

 
—

 
—

 
—

Weighted average shares outstanding-diluted
 
81.3

 
64.3

 
77.6

 
50.6

EPS:
 
 
 
 
 
 
 
 
Net income (loss) per share-basic
$
0.05

 
$
(0.08
)
 
$
0.24

 
$
(0.30
)
 
Effect of dilutive shares:
 
 
 
 
 
 
 
 
Net income (loss) per share-diluted
 
$
0.05

 
$
(0.08
)
 
$
0.24

 
$
(0.30
)

(1) We have excluded 0.8 million weighted average shares of restricted stock, and 15.4 million of operating partnership units which are securities convertible into our common stock, from our diluted earnings per share as of September 30, 2015. These amounts were deemed anti-dilutive.
(2) Includes the dilutive impact of shares issuable under the forward sales agreement using the treasury stock method.