Earnings Per Share

9 Months Ended

Sep. 30, 2012

Earnings Per Share [Abstract]

Earnings Per Share

EARNINGS PER SHARE

Basic earnings per share is computed by dividing net income by the weighted average number of common shares outstanding during the period, including outstanding unvested restricted stock awards which contain rights to non-forfeitable dividends. Diluted earnings per share is computed by dividing net income by the weighted average number of common shares outstanding adjusted for the dilutive effect of stock options.

The computation of weighted average common and common equivalent shares used in the calculation of basic and diluted earnings per share is as follows:

	Three Months Ended		Nine Months Ended
	September 30,		September 30,
	2012	2011	2012	2011
Weighted average common shares outstanding used in calculating basic earnings per share	121.2	144.4	124.4	146.9
Effect of dilutive stock options	2.2	2.6	2.0	2.6
Weighted average common and common equivalent shares used in calculating diluted earnings per share	123.4	147.0	126.4	149.5

A summary of anti-dilutive options excluded from the computation of diluted earnings per share is as follows:

	Three Months Ended		Nine Months Ended
	September 30,		September 30,
	2012	2011	2012	2011
Anti-dilutive options excluded from the computation of diluted earnings per share	0.9	0.4	0.9	0.4