Net Income Per Share (Tables)

3 Months Ended

Mar. 31, 2020

Earnings Per Share [Abstract]

Calculation of basic and diluted earnings per share

The following table sets forth the computation of basic and diluted net income per share for the periods presented (in millions of dollars, except share and per share amounts):

	Quarter Ended
	March 31,
	2020		2019
Numerator:
Net income	$	29.1	$	28.0
Denominator – Weighted-average common shares outstanding (in thousands):
Basic	15,838		16,108
Add: dilutive effect of non-vested common shares, restricted stock units and performance shares1	170		264
Diluted	16,008		16,372
Net income per common share, Basic:	$	1.83	$	1.74
Net income per common share, Diluted:	$	1.81	$	1.71

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During the quarters ended March 31, 2020 and March 31, 2019, a total of two thousand and four thousand shares, respectively,