Net Earnings Per Common Share

3 Months Ended

Mar. 31, 2012

Net Earnings Per Common Share

Note 11.       Net Earnings Per Common Share

Basic net earnings per common share is computed using the weighted average common shares outstanding during the period.  Diluted net earnings per common share is computed by using the weighted average common shares outstanding including the dilutive effect of stock options, shares issued under the Employee Stock Purchase Plan and restricted shares based on an average share price during the period.  For the three months ended March 31, 2012 and 2011, approximately 0.5 and 0.4 shares of the Company’s common stock, respectively, were excluded from the determination of diluted earnings per common share because their effect would have been anti-dilutive.  The computations of basic and diluted earnings per share for the three months, ended March 31, 2012 and 2011, respectively, are as follows:

	THREE MONTHS ENDED
	March 31,		March 31,
	2012		2011
Net earnings	$	68.8	$	50.3
Basic weighted average common shares		102.0		100.9
Effect of dilutive stock options and
employee stock purchase plan shares		0.1		0.1
Effect of restricted shares issued		0.4		0.7
Diluted weighted average common shares		102.5		101.7
Basic net earnings per share	$	0.67	$	0.50
Diluted net earnings per share	$	0.67	$	0.49