Per Common Share Information

6 Months Ended

Jun. 30, 2011

Per Common Share Information

Per Common Share Information

Diluted earnings per common share is calculated using net income divided by diluted weighted-average shares. Diluted weighted-average shares include weighted-average shares outstanding plus the dilutive effect of share-based compensation calculated using the treasury stock method, of 12.1 million shares and 13.8 million shares for the second quarter 2011 and 2010, respectively, and 12.4 million shares and 14.0 million shares for the six months ended June 30, 2011 and 2010, respectively. There were no antidilutive stock options excluded in the diluted weighted-average shares calculation for the second quarter and six months ended June 30, 2011 and 2010.