Net Income (Loss) Per Share and Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2017

Calculation of basic and diluted earnings per share

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



	Year Ended December 31,
	2017		2016		2015
Numerator:
Net income (loss)	$	45.4	$	91.7	$	(236.6	)
Denominator – Weighted-average common shares outstanding (in thousands):
Basic	16,996		17,813		17,201
Add: dilutive effect of non-vested common shares, restricted stock units and performance shares	263		220		—
Diluted	17,259		18,033		17,201

Net income (loss) per common share, Basic:	$	2.67	$	5.15	$	(13.76	)
Net income (loss) per common share, Diluted:	$	2.63	$	5.09	$	(13.76	)

Schedule of securities excluded from weighted-average diluted shares

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):



	Year Ended December 31,
	2017	2016	2015
Non-vested common shares, restricted stock units and performance shares	52	50	302
Warrants	—	—	639
Total excluded	52	50	941

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,
	2017		2016		2015
Number of common shares repurchased	938,680		443,838		647,520
Weighted-average repurchase price (dollars per share)	$	82.97	$	78.59	$	76.35
Total cost of repurchased common shares (in millions of dollars)	$	77.8	$	34.9	$	49.4