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NET INCOME PER SHARE
 9 Months Ended
Sep. 30, 2012
NET INCOME PER SHARE  
NET INCOME PER SHARE

9.  NET INCOME PER SHARE

 

For the three and nine months ended September 30, 2011 and 2012, outstanding stock options were the only potentially dilutive securities. The reconciliation from basic to diluted weighted average common shares outstanding is as follows (in thousands):

 

 

 

Three Months Ended
September 30,

 

Nine Months Ended
September 30,

 

 

 

2011

 

2012

 

2011

 

2012

 

Basic weighted-average common shares outstanding

 

15,401

 

15,560

 

15,393

 

15,517

 

Stock options

 

88

 

91

 

97

 

88

 

Diluted weighted-average common shares outstanding

 

15,489

 

15,651

 

15,490

 

15,605

 

 

The above calculations for the three months ended September 30, 2011 and 2012 do not include 313,000 and 322,000 shares, respectively, related to certain stock options because the effects of such were anti-dilutive. For the nine months ended September 30, 2011 and 2012, the calculation does not include 267,000 and 362,000 shares, respectively, related to certain stock options because the effect on such options was anti-dilutive.