Net Income Per Share and Stockholders' Equity (Tables)

6 Months Ended

Jun. 30, 2018

Calculation of basic and diluted earnings per share

basic and diluted net income per share for periods presented (in millions of dollars, except share and per share amounts):



	Quarter Ended				Six Months Ended
	June 30,				June 30,
	2018		2017		2018		2017
Numerator:
Net income	$	20.7	$	4.7	$	46.4	$	40.7
Denominator – Weighted-average common shares outstanding (in thousands):
Basic	16,685		17,003		16,696		17,193
Add: dilutive effect of non-vested common shares, restricted stock units and performance shares	220		198		266		225
Diluted	16,905		17,201		16,962		17,418

Net income per common share, Basic:	$	1.24	$	0.28	$	2.78	$	2.37
Net income per common share, Diluted:	$	1.22	$	0.27	$	2.74	$	2.34

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 periods presented as their inclusion would have been anti-dilutive (in thousands of shares):



	Quarter Ended		Six Months Ended
	June 30,		June 30,
	2018	2017	2018	2017
Non-vested common shares, restricted stock units and performance shares	2	55	1	56
Total excluded	2	55	1	56