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Earnings Per Share (Tables)
 9 Months Ended
Sep. 30, 2019
Earnings Per Share [Abstract]  
Calculation of EPS
The following table sets forth the calculation of EPS for the three and nine months ended September 30, 2019 and 2018 (in millions, except share data):
 
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
 
 
2019
 
2018
 
2019
 
2018
Weighted average basic common shares outstanding
 
17,961,555

 
19,252,948

 
17,889,572

 
19,858,643

Dilutive effect of stock awards and employee stock purchases, net of assumed repurchase of treasury stock
 
17,145

 
8,122

 
17,978

 
8,876

Weighted average dilutive common shares
 
17,978,700

 
19,261,070

 
17,907,550

 
19,867,519

Basic:
 
 
 
 
 
 
 
 
Net income (loss)
 
$
38.0

 
$
34.8

 
$
125.9

 
$
127.1

Less: Earnings (loss) allocated to participating securities
 
1.4

 
1.2

 
4.7

 
4.3

Net income (loss) available to basic common shares
 
$
36.6

 
$
33.6

 
$
121.2

 
$
122.8

Basic earnings (loss) per common share
 
$
2.04

 
$
1.74

 
$
6.78

 
$
6.18

Diluted:
 
 
 
 
 
 
 
 
Net income (loss)
 
$
38.0

 
$
34.8

 
$
125.9

 
$
127.1

Less: Earnings (loss) allocated to participating securities
 
1.4

 
1.2

 
4.7

 
4.3

Net income (loss) available to diluted common shares
 
$
36.6

 
$
33.6

 
$
121.2

 
$
122.8

Diluted earnings (loss) per common share
 
$
2.04

 
$
1.74

 
$
6.77

 
$
6.18