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Employee Benefits (Tables)
12 Months Ended
Sep. 30, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]  
Black-Scholes Option Pricing Model to Determine Grant-date Fair Value for Stock Options

We have elected to use the Black-Scholes option pricing model to determine grant-date fair value for stock options, with the following assumptions: (i) expected share price volatility based on the average of Meridian’s historical volatility over the options’ expected lives and implied volatility based on the value of tradable call options; (ii) expected life of options based on contractual lives, employees’ historical exercise behavior and employees’ historical post-vesting employment termination behavior; (iii) risk-free interest rates based on treasury rates that correspond to the expected lives of the options; and (iv) dividend yield based on the expected yield on underlying Meridian common stock.

 

Year ended September 30,

   2013   2012   2011

Risk-free interest rates

   0.88%   1.24%   1.91%

Dividend yield

   4.1%   3.42%   3.74%

Life of option

   6.23 yrs.   6.22 yrs.   5.93 yrs.

Share price volatility

   36%   39%   34%

Forfeitures (by employee group)

   0%-10%   0%-10%   0%-10%
Summary of Stock Option Plans

A summary of the status of our stock option plans at September 30, 2013 and changes during the year is presented in the table and narrative below:

 

     Options     Wtd Avg
Exercise
Price
     Wtd Avg
Remaining
Life (Yrs)
     Aggregate
Intrinsic
Value
 

Outstanding beginning of period

     2,026     $ 16.93        

Grants

     66       21.08        

Exercises

     (225     10.03        

Forfeitures

     (8     20.68        

Cancellations

     (351     17.74        
  

 

 

   

 

 

       

Outstanding end of period

     1,508     $ 17.93        6.11      $ 9,486  
  

 

 

   

 

 

    

 

 

    

 

 

 

Exercisable end of period

     721     $ 17.90        3.87      $ 5,017  
  

 

 

   

 

 

    

 

 

    

 

 

 
Summary of Nonvested Options

A summary of the status of our nonvested options as of September 30, 2013, and changes during the year ended September 30, 2013, is presented below:

 

     Options     Weighted-
Average
Grant Date
Fair Value
 

Nonvested beginning of period

     1,162     $ 4.95  

Granted

     66       4.19  

Vested

     (88     8.07  

Forfeitures

     (8     5.11  

Cancelled

     (351     4.66  
  

 

 

   

 

 

 

Nonvested end of period

     781     $ 4.66