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Earnings Per Common Share
6 Months Ended
Jun. 30, 2013
Earnings Per Share [Abstract]  
Earnings Per Common Share
NOTE 3. Earnings Per Common Share

Basic earnings per share represents income available to common shareholders divided by the weighted average number of common shares outstanding during the period. Diluted earnings per share reflects additional common shares that would have been outstanding if dilutive potential common shares had been issued, as well as any adjustment to income that would result from the assumed issuance. The number of potential common shares is determined using the treasury method and relates to outstanding stock options and unvested restricted stock grants.

The following table shows the weighted average number of shares used in computing earnings per share for the three and six months ended June 30, 2013 and 2012 and the effect on the weighted average number of shares of dilutive potential common stock. Potential dilutive common stock had no effect on income available to common shareholders.
 
Three Months Ended
 
Six Months Ended
 
June 30,
 
June 30,
 
2013
 
2012
 
2013
 
2012
Average number of common shares outstanding
3,378,955

 
3,326,999

 
3,373,353

 
3,321,502

Effect of dilutive common stock
10,109

 
8,891

 
10,395

 
8,821

Average number of common shares outstanding used to calculate diluted earnings per share
3,389,064

 
3,335,890

 
3,383,748

 
3,330,323