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Net Income (Loss) per Common Share (Tables)
 3 Months Ended
Mar. 31, 2020
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted
The following table presents the computation of basic and diluted net income (loss) per share under the two-class method for the three months ended March 31, 2020 and 2019 (in millions, except for per share amounts):
 
 
Three Months Ended
March 31,
 
 
2020
 
2019
Net income from continuing operations
 
$
8.3

 
$
10.0

Less: Distributed net income available to participating securities
 
(0.3
)
 
0.0

Numerator for basic and diluted net income per share:
 
 
 
 
Undistributed and distributed net income available to common shareholders
 
$
8.0

 
$
10.0

 
 
 
 
 
Denominator:
 
 
 
 
Weighted average shares outstanding for basic net income per share
 
37.7

 
37.4

Effect of dilutive securities
 
0.2

 
0.5

Weighted average shares outstanding for diluted net income per share
 
37.9

 
37.9

Net income per share from continuing operations:
 
 
 
 
Basic
 
$
0.21

 
$
0.27

Diluted
 
$
0.21

 
$
0.26

 
 
 
 
 
Net loss from discontinued operations
 
$
(0.1
)
 
$
(0.3
)
Net loss per share from discontinued operations:
 
 
 
 
Basic
 
$
0.00

 
$
(0.01
)
Diluted
 
$
0.00

 
$
(0.01
)
 
 
 
 
 
Net income per share:
 
 
 
 
Basic
 
$
0.21

 
$
0.26

Diluted
 
$
0.21

 
$
0.25

 
 
 
 
 
Potentially dilutive securities
 
0.7

 
0.2