Net Income Per Share and Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2018

Calculation of basic and diluted earnings per share

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



	Year Ended December 31,
	2018		2017		2016
Numerator:
Net income	$	91.7	$	45.4	$	91.7
Denominator – Weighted-average common shares outstanding (in thousands):
Basic	16,585		16,996		17,813
Add: dilutive effect of non-vested common shares, restricted stock units and performance shares¹	289		263		220
Diluted	16,874		17,259		18,033

Net income per common share, Basic:	$	5.53	$	2.67	$	5.15
Net income per common share, Diluted:	$	5.43	$	2.63	$	5.09

Treasury Stock

Repurchases of our common stock pursuant to the stock repurchase program is recorded as Treasury stock and consisted of the following for each period presented:



	Year Ended December 31,
	2018		2017		2016
Number of common shares repurchased	617,151		938,680		443,838
Weighted-average repurchase price (dollars per share)	$	100.28	$	82.97	$	78.59
Total cost of repurchased common shares (in millions of dollars)	$	61.9	$	77.8	$	34.9