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Earnings per Share
12 Months Ended
Sep. 30, 2013
Earnings Per Share [Abstract]  
Earnings per Share
Earnings per Share
Basic net income per share is calculated by dividing net income by the weighted average number of shares outstanding for the period. Diluted net income per share reflects the assumed conversion of all dilutive securities, if any. For the years ended September 30, 2013, 2012 and 2011, approximately 1.6 million shares, 1.5 million shares and 1.1 million shares, respectively, which could be issued under outstanding stock-based grants, were not included in the determination of our diluted shares outstanding as they were anti-dilutive.
The calculation of the weighted average number of shares outstanding used in computing basic and diluted net income per share was as follows:
 

 
Year Ended September 30,
 
 
2013
 
2012
 
2011
Weighted average number of shares
 
(In thousands)
Basic shares outstanding
 
24,515

 
24,711

 
24,427

Dilutive effect related to employee stock plans
 
189

 
226

 
313

Diluted shares outstanding
 
24,704

 
24,937

 
24,740