Earnings Per Share

12 Months Ended

Dec. 31, 2011

Earnings Per Share

Earnings Per Share

15.Earnings Per Share

The following table presents earnings per weighted-average common share outstanding for the years ended December 31, 2011, 2010 and 2009:

	2011		2010		2009
Basic earnings per share:
Income from continuing operations attributable to common shareholders	$	3.01	$	3.05	$	2.34
Income (loss) from discontinuedoperations	0.10		0.23		(1.66		)
Earnings per share — basic	$	3.11	$	3.28	$	0.68
Diluted earnings per share:
Income from continuing operations attributable to common shareholders	$	2.99	$	3.03	$	2.34
Income (loss) from discontinuedoperations	0.10		0.24		(1.67		)
Earnings per share — diluted	$	3.09	$	3.27	$	0.67

Dilutive stock options and performance shares (which are contingently issuable) increased average common shares outstanding by approximately 811,000 shares in 2011, 565,000 shares in 2010 and 103,000 shares in 2009.  Total average common shares outstanding for the purposes of calculating diluted earnings per share were 109,864,243 shares in 2011, 107,137,785 shares in 2010 and 101,263,795 shares in 2009.

For the year ended 2011, there were no common stock options that were excluded from the computation of diluted earnings per share as a result of the options’ exercise prices being greater than the average market price of the common shares.  Options to purchase shares of common stock that were not included in the computation of diluted earnings per share were 192,542 during 2010 and 572,301 during 2009.