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Earnings Per Share
 12 Months Ended
Dec. 31, 2012
Earnings Per Share [Abstract]  
Earnings Per Share
Note 11.
Earnings Per Share
 
The following table shows the weighted average number of shares used in computing earnings per share and the effect on weighted average number of shares of dilutive potential common stock.

 
 
2012
 
 
2011
 
 
2010
 
 
 
Shares
 
 
Per Share
 Amount
 
 
Shares
 
 
Per Share
 Amount
 
 
Shares
 
 
Per Share
 Amount
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Basic earnings per share
 
 
3,691,517
 
 
$
0.56
 
 
 
3,666,206
 
 
$
1.12
 
 
 
3,627,016
 
 
$
1.01
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Effect of dilutive securities, stock-based awards
 
 
15,577
 
 
 
 
 
 
 
17,955
 
 
 
 
 
 
 
16,093
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Diluted earnings per share
 
 
3,707,094
 
 
$
0.55
 
 
 
3,684,161
 
 
$
1.12
 
 
 
3,643,109
 
 
$
1.01