Net Income Per Share and Stockholders' Equity (Tables)

6 Months Ended

Jun. 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				Six Months Ended
	June 30,				June 30,
	2017		2016		2017		2016
Numerator:
Net income	$	4.7	$	26.0	$	40.7	$	52.3
Denominator – Weighted-average common shares outstanding (in thousands):
Basic¹	17,003		17,871		17,193		17,867
Add: dilutive effect of non-vested common shares, restricted stock units, performance shares and stock options	198		323		225		327
Diluted²	17,201		18,194		17,418		18,194

Net income per common share, Basic:	$	0.28	$	1.45	$	2.37	$	2.92
Net income per common share, Diluted:	$	0.27	$	1.43	$	2.34	$	2.87

______________________


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 six months ended June 30, 2017 and June 30, 2016 as their inclusion would have been anti-dilutive (in thousands of shares):



	Quarter Ended		Six Months Ended
	June 30,		June 30,
	2017	2016	2017	2016
Non-vested common shares, restricted stock units and performance shares	55	2	56	65
Total excluded	55	2	56	65