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Earnings Per Common Share
9 Months Ended
Sep. 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 nine months ended September 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
 
Nine Months Ended
 
September 30,
 
September 30,
 
2013
 
2012
 
2013
 
2012
Average number of common shares outstanding
3,393,519

 
3,341,050

 
3,380,149

 
3,328,065

Effect of dilutive common stock
12,685

 
11,287

 
11,158

 
9,643

Average number of common shares outstanding used to calculate diluted earnings per share
3,406,204

 
3,352,337

 
3,391,307

 
3,337,708