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The Incentive Stock Plans (Tables)
3 Months Ended
Dec. 31, 2013
Text Block [Abstract]  
Incentive Stock Plans Option Activity

The following table summarizes option activity from September 30, 2013 through December 31, 2013:

 

     Shares
Available
for Grant
    Options
Outstanding
    Aggregate
Intrinsic Value

(in thousands)
     Weighted
Average
Exercise
Price
     Weighted
Average
Remaining
Contractual
Life
 

Balance at September 30, 2013

     1,787,537        2,301,638      $ 10,419       $ 10.13         6.5   

Options granted

     (566,000     566,000         $ 15.81      

Options cancelled/forfeited/expired

     54,028        (54,028      $ 17.16      

Options exercised

     —          (185,898      $ 7.39      
  

 

 

   

 

 

         

Balance at December 31, 2013

     1,275,565        2,627,712      $ 16,067       $ 11.40         7.1   
  

 

 

   

 

 

   

 

 

       

Exercisable at December 31, 2013

       1,704,805      $ 12,372       $ 11.11         6.0   
    

 

 

   

 

 

       
Weighted Average Assumptions of Incentive Stock Plans

The following are the weighted average assumptions used for each respective period:

 

     Three Months Ended
December 31,
 
     2012     2013  

Dividend yield

     0.0     0.0

Risk-free interest rate

     0.6     0.7

Volatility

     80.7     55.7

Expected life

    
 
4.3
years
  
  
   
 
3.2
years