Note 10. Earnings (Loss) per Common Share

Basic earnings or loss per share attributable to the Company’s common stockholders is computed by dividing net earnings or loss attributable to common stockholders by the weighted average number of common shares outstanding for the period. Diluted earnings or loss per share attributable to common stockholders presents the dilutive effect, if any, on a per share basis of potential common shares (such as restricted stock units) as if they had been vested or converted during the periods presented. No such items were included in the computation of diluted loss per share for the six months ended June 30, 2018 because the Company incurred a net loss in the period and the effect of inclusion would have been anti-dilutive.


	Three months ended				Six months ended
	June 30,				June 30,
	2019		2018		2019		2018
	(in millions, except share data)
Net income (loss)	$	9.4	$	24.6	$	17.6	$	(137.4)

Basic weighted-average shares		80,675,392		81,868,508		80,513,361		83,159,949
Effect of dilutive securities:
Restricted stock awards		235,284		784,207		389,671		—
Diluted weighted-average shares		80,910,676		82,652,715		80,903,032		83,159,949

Basic net income (loss) per share	$	0.12	$	0.30	$	0.22	$	(1.65)
Diluted net income (loss) per share	$	0.12	$	0.30	$	0.22	$	(1.65)