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EQUITY-BASED INCENTIVE AWARDS (Details) (USD $)
In Millions, except Share data, unless otherwise specified
 9 Months Ended
Jun. 30, 2012
EQUITY-BASED INCENTIVE AWARDS  
Number of shares of the company's common stock permitted for issuance under the plan 150,000
Number of shares awarded pursuant to the plan, net of forfeitures 109,800
Number of shares that may be awarded under the plan 40,200
Stock Options
  
Omnibus plan and stock option activity  
Vesting period (in years) 5 years
Estimated fair value of the stock option awards using the Black-Scholes option pricing model $ 0.1
Stock Option Pricing Assumptions  
Risk-free interest rate (as a percent) 2.39%
Dividend yield (as a percent) 1.10%
Expected volatility (as a percent) 27.90%
Expected life (in years) 6 years
Expiration period (in years) 10 years
Stock options issued and outstanding  
Number Outstanding (in shares) 37,042
Number Exercisable (in shares) 27,242
Exercisable, Weighted-Average Exercise Price (in dollars per share) $ 20.72
Number of Shares  
Outstanding at the beginning of the period (in shares) 30,583
Granted (in shares) 6,500
Exercised (in shares) (41)
Outstanding at the end of the period (in shares) 37,042
Weighted Average Exercise Price  
Outstanding at beginning of the period (in dollars per share) $ 24.05
Granted (in dollars per share) $ 54.74
Exercised (in dollars per share) $ 28.80
Outstanding at the end of the period (in dollars per share) $ 29.43
Stock Options | Fiscal 2003 stock options
  
Stock options issued and outstanding  
Number Outstanding (in shares) 42
Remaining Weighted-Average Contractual Life 3 months 25 days
Number Exercisable (in shares) 42
Exercisable, Weighted-Average Exercise Price (in dollars per share) $ 28.80
Number of Shares  
Outstanding at the end of the period (in shares) 42
Weighted Average Exercise Price  
Outstanding at the end of the period (in dollars per share) $ 28.80
Stock Options | Fiscal 2007 stock options
  
Stock options issued and outstanding  
Number Outstanding (in shares) 25,000
Remaining Weighted-Average Contractual Life 4 years 5 months 12 days
Number Exercisable (in shares) 25,000
Exercisable, Weighted-Average Exercise Price (in dollars per share) $ 18.00
Number of Shares  
Outstanding at the end of the period (in shares) 25,000
Weighted Average Exercise Price  
Outstanding at the end of the period (in dollars per share) $ 18.00
Stock Options | Fiscal 2010 stock options
  
Stock options issued and outstanding  
Number Outstanding (in shares) 5,500
Remaining Weighted-Average Contractual Life 7 years 9 months 29 days
Number Exercisable (in shares) 2,200
Exercisable, Weighted-Average Exercise Price (in dollars per share) $ 51.50
Number of Shares  
Outstanding at the end of the period (in shares) 5,500
Weighted Average Exercise Price  
Outstanding at the end of the period (in dollars per share) $ 51.50
Stock Options | Fiscal 2012 stock options
  
Stock options issued and outstanding  
Number Outstanding (in shares) 6,500
Remaining Weighted-Average Contractual Life 9 years 3 months 29 days
Number of Shares  
Outstanding at the end of the period (in shares) 6,500
Weighted Average Exercise Price  
Granted (in dollars per share) $ 54.74
Outstanding at the end of the period (in dollars per share) $ 54.74
Stock Options | Fiscal 2012 stock options | Minimum
  
Weighted Average Exercise Price  
Outstanding at the end of the period (in dollars per share) $ 53.80
Stock Options | Fiscal 2012 stock options | Maximum
  
Weighted Average Exercise Price  
Outstanding at the end of the period (in dollars per share) $ 65.97