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Earnings Per Share (Tables)
 3 Months Ended
Mar. 31, 2017
Earnings Per Share [Abstract]  
Schedule of Calculation of Numerator and Denominator in Earnings Per Share
Reconciliations of the numerator and the denominator of the basic and diluted per share computations for the Company's common stock, for the three months ended March 31, 2017 and 2016, are summarized as follows:

 
Three Months Ended March 31,
 
2017
 
2016
Numerator
 
 
 
Net earnings
$
25.4

 
$
3.8

 
 
 
 
Denominator
 
 
 
Basic weighted average number of common shares outstanding for all classes of common shares
49.1

 
47.6

Plus: effect of dilutive equity incentive instruments
2.4

 
0.9

Diluted weighted average number of common shares outstanding for all classes of common shares
51.5

 
48.5

 
 
 
 
Earnings per share
 
 
 
Basic
$
0.52

 
$
0.08

Diluted
$
0.49

 
$
0.08

 
 
 
 
Cash dividends paid per common share for all classes of common shares
$
0.30

 
$
0.30