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Net Income Per Common Share Computations
 12 Months Ended
Dec. 31, 2016
Earnings Per Share [Abstract]  
Net Income Per Common Share Computations
NET INCOME PER COMMON SHARE COMPUTATIONS
The following is a reconciliation of the numerator and denominator of the net income per common share computations:
 
Years Ended December 31,
(in millions, except per share data)
2016
 
2015
 
2014
Numerator for basic income per common share:
 
 
 
 
 
Net income
$
108.1

 
$
65.2

 
$
46.4

Net income allocated to participating securities
(1.0
)
 
(0.6
)
 
(0.3
)
Numerator for basic net income per common share
$
107.1

 
$
64.6

 
$
46.1

 
 
 
 
 
 
Numerator for diluted income per common share
$
108.1

 
$
65.2

 
$
46.4

 
 
 
 
 
 
Denominator for net income per common share:
 
 
 
 
 
Basic
16.4

 
17.2

 
17.3

Plus dilutive effect of stock options and restricted stock
0.2

 
0.1

 
0.1

Plus dilutive effect of participating securities
0.2

 
0.3

 
0.2

Diluted
16.8

 
17.6

 
17.6

 
 
 
 
 
 
Income per common share:
 
 
 
 
 
Basic
$
6.52

 
$
3.75

 
$
2.67

Diluted
$
6.42

 
$
3.71

 
$
2.64