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Share-Based Compensation (Tables)
9 Months Ended
Jun. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Assumptions for Estimation of Fair Values of Stock Appreciation Rights Granted During Reporting Periods

The fair values of stock appreciation rights granted during the annual share-based grants in November of 2014 and 2013, respectively, were estimated on the date of grant using a lattice-based binomial valuation model based on the following assumptions:

 

     2015     2014  

Risk-free interest rate

     2.20     2.31

Expected volatility

     19.00     19.00

Expected dividend yield

     1.78     2.00

Expected life

     7.6 years        7.8 years   

Fair value derived

   $ 24.82      $ 19.90