Earnings per Common Share

6 Months Ended

Jun. 30, 2014

Earnings Per Share [Abstract]

Earnings per Common Share

7. Earnings per Common Share

The computation of basic earnings per common share for the periods presented is based upon the weighted average number of common shares outstanding during the periods. The computation of diluted earnings per common share includes the effect of non-vested nonqualified stock options and restricted stock units assuming such options and stock units were outstanding common shares at the beginning of the period. The effect of antidilutive securities is excluded from the computation of diluted earnings per common share.

The following table sets forth the computation of basic and diluted earnings per common share:

	Three Months Ended June 30,						Six Months Ended June 30,
	2014			2013			2014			2013
(Dollars in millions, except share amounts, in thousands, and per share amounts)
Net income attributable to Koppers	$	1.6		$	14.4		$	3.8		$	25.4
Less: loss from discontinued operations		(0.1	)		(0.1	)		(0.1	)		0.0
Income from continuing operations attributable to Koppers	$	1.7		$	14.5		$	3.9		$	25.4
Weighted average common shares outstanding:
Basic		20,475			20,727			20,430			20,697
Effect of dilutive securities		107			218			154			238
Diluted		20,582			20,945			20,584			20,935
Earnings per common share – continuing operations:
Basic earnings per common share	$	0.08		$	0.70		$	0.19		$	1.23
Diluted earnings per common share		0.08			0.70			0.19			1.21
Other data:
Antidilutive securities excluded from computation of diluted earnings per common share		284			254			258			227