Earnings per Share (Tables)

12 Months Ended

Dec. 31, 2012

Weighted-Average Shares Outstanding for Computation of Basic and Diluted Income Per Common Share

The following table reconciles the weighted-average shares outstanding for computation of basic and diluted income per Common share for each of the three years ended December 31, 2012. No difference existed between net income used in computing basic and diluted income per Common share for these years.

(Weighted-average shares outstanding)	2012		2011		2010
Basic method		193,902,335		193,409,621		191,830,357
Dilutive stock options		766,402		1,102,781		1,327,457
Diluted method		194,668,737		194,512,402		193,157,814