Net Income Per Share and Stockholders' Equity (Tables)

9 Months Ended

Sep. 30, 2017

Calculation of basic and diluted earnings per share

Basic and diluted net income per share were calculated as follows, for each period presented (in millions of dollars, except share and per share amounts):



	Quarter Ended				Nine Months Ended
	September 30,				September 30,
	2017		2016		2017		2016
Numerator:
Net income	$	19.9	$	14.9	$	60.6	$	67.2
Denominator – Weighted-average common shares outstanding (in thousands):
Basic¹	16,834		17,841		17,072		17,858
Add: dilutive effect of non-vested common shares, restricted stock units, performance shares and stock options	326		334		291		323
Diluted²	17,160		18,175		17,363		18,181

Net income per common share, Basic:	$	1.18	$	0.84	$	3.55	$	3.76
Net income per common share, Diluted:	$	1.16	$	0.82	$	3.49	$	3.70

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¹	The basic weighted-average number of common shares outstanding during the periods presented excludes non-vested common shares, restricted stock units and performance shares.


²	The diluted weighted-average number of common shares outstanding during the periods presented was calculated using the treasury method.

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

The following securities were excluded from the weighted-average diluted shares computation for the quarters and nine months ended September 30, 2017 and September 30, 2016 as their inclusion would have been anti-dilutive (in thousands of shares):



	Quarter Ended		Nine Months Ended
	September 30,		September 30,
	2017	2016	2017	2016
Non-vested common shares, restricted stock units and performance shares	3	3	3	2
Total excluded	3	3	3	2