Earnings per Share

6 Months Ended

Jun. 30, 2013

Earnings per Share

(5) Earnings per Share

Basic earnings per share is computed by dividing net income, after the deduction of preferred stock dividends and undistributed earnings allocated to participating securities, by the weighted average number of common shares outstanding during the period. Diluted earnings per share assumes the issuance of common stock for all potentially dilutive share equivalents outstanding not classified as participating securities. Participating securities are defined as unvested stock-based payment awards that contain nonforfeitable rights to dividends.

	Three Months Ended June 30,						Six Months Ended June 30,
(In thousands, except per share amounts)	2013			2012			2013			2012
Net income attributable to Mine Safety Appliances Company	$	24,049		$	27,995		$	43,335		$	51,917
Preferred stock dividends		(10	)		(10	)		(20	)		(20	)
Income available to common equity		24,039			27,985			43,315			51,897
Dividends and undistributed earnings allocated to participating securities		(176	)		(258	)		(347	)		(519	)
Income available to Mine Safety Appliances Company common shareholders		23,863			27,727			42,968			51,378
Basic earnings per common share	$	0.65		$	0.76		$	1.17		$	1.41
Diluted earnings per common share	$	0.64		$	0.75		$	1.15		$	1.39
Basic shares outstanding		36,880			36,590			36,807			36,486
Stock options and other stock compensation		551			491			593			500
Diluted shares outstanding		37,431			37,081			37,400			36,986
Antidilutive stock options		188			410			188			410