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Net Income Per Common Share (Tables)
 12 Months Ended
Dec. 31, 2021
Earnings Per Share [Abstract]  
Summary of Earnings Per Share Basic and Diluted

Computations of basic and diluted net income per common share for the years ended December 31, 2021, 2020 and 2019, are as follows:

 

(In millions, except per share data)

 

2021

 

 

2020

 

 

2019

 

Basic net income per common share:

 

 

 

 

 

 

 

 

 

Net income

 

$

16.1

 

 

$

31.7

 

 

$

306.6

 

Weighted average common shares outstanding

 

 

84.1

 

 

 

83.8

 

 

 

84.9

 

Basic net income per common share

 

$

0.19

 

 

$

0.38

 

 

$

3.61

 

 

 

 

 

 

 

 

 

 

 

Diluted net income per common share:

 

 

 

 

 

 

 

 

 

Weighted average common shares outstanding — Basic

 

 

84.1

 

 

 

83.8

 

 

 

84.9

 

Plus incremental shares from assumed conversions:

 

 

 

 

 

 

 

 

 

Restricted stock units

 

 

0.3

 

 

 

0.1

 

 

 

0.3

 

Stock options

 

 

0.2

 

 

 

0.1

 

 

 

0.6

 

Weighted average common shares outstanding — Dilutive

 

 

84.6

 

 

 

84.0

 

 

 

85.8

 

Dilutive net income per common share

 

$

0.19

 

 

$

0.38

 

 

$

3.57

 

 

 

 

 

 

 

 

 

 

 

Anti-dilutive shares outstanding, excluded from computation

 

 

0.6

 

 

 

0.9

 

 

 

0.1