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Basic and Diluted Loss Per Common Share (Tables)
12 Months Ended
Dec. 31, 2018
Earnings Per Share [Abstract]  
Calculation of Basic Income (Loss) Per Common Share to Diluted Income (Loss) Per Common Share
The following table presents a reconciliation of net income (loss) used in basic and diluted EPS calculations (in millions, except per share amounts):
 
 
Years Ended December 31,
 
 
2018
 
2017
 
2016
Loss from continuing operations attributable to common stock and participating preferred stockholders
 
$
155.6

 
$
(49.7
)
 
$
(105.4
)
 
 
 
 
 
 
 
Earnings allocable to common shares:
 
 
 
 
 
 
Numerator for basic and diluted EPS
 
 
 
 
 
 
Participating shares at end of period:
 
 
 
 
 
 
Weighted-average Common stock outstanding - basic
 
44.3

 
42.8

 
37.3

Unvested restricted stock
 
0.4

 

 

Preferred stock (as-converted basis)
 
4.9

 

 

Total
 
49.6

 
42.8

 
37.3

 
 
 
 
 
 
 
Percentage of loss allocated to:
 
 
 
 
 
 
Common Stock
 
89.3
%
 
100
%
 
100
%
Unvested restricted stock
 
0.8
%
 
%
 
%
Preferred Stock
 
9.9
%
 
%
 
%
 
 
 
 
 
 
 
Net Income (loss) attributable to common stock, basic
 
$
139.0

 
$
(49.7
)
 
$
(105.4
)
 
 
 
 
 
 
 
Distributed and Undistributed earnings to Common Stockholders:
 
 
 
 
 
 
Effect of assumed shares under treasury stock method for stock options and restricted shares and if-converted method for convertible instruments
 
(3,270
)
 

 

Income from the dilutive impact of subsidiary securities
 

 

 

Net Income (loss) attributable to common stock, diluted
 
$
135.7

 
$
(49.7
)
 
$
(105.4
)
 
 
 
 
 
 
 
Denominator for basic and dilutive earnings per share
 
 
 
 
 
 
Weighted average common shares outstanding - basic
 
44.3

 
42.8

 
37.3

Effect of assumed shares under treasury stock method for stock options and restricted shares and if-converted method for convertible instruments
 
2.6

 

 

Weighted average common shares outstanding - diluted
 
46.8

 
42.8

 
37.3

 
 
 
 
 
 
 
Net income (loss) attributable to participating security holders - basic
 
$
3.14

 
$
(1.16
)
 
$
(2.83
)
Net income (loss) attributable to participating security holders - diluted
 
$
2.90

 
$
(1.16
)
 
$
(2.83
)