Annual report pursuant to Section 13 and 15(d)

SHARE-BASED PAYMENTS (Details)

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SHARE-BASED PAYMENTS (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 12 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2010
Share-based compensation, aggregate disclosures [Abstract]      
Total stock-based compensation cost $ 5,472 $ 6,972 $ 6,567
Future income tax benefit from compensation expense recognized 2,134 2,719 2,561
Cash received from stock options exercised 264 1,859 1,502
Tax benefit realized from options exercised 22 278 264
2007 Equity Incentive Plan [Member]
      
Share-based compensation, aggregate disclosures [Abstract]      
Term of plan (in years) 10 years    
Maximum number of shares available for grants or awards (in shares) 2,200,000    
Shares reserved for future issuance under award plan (in shares) 790,652    
Restricted Stock [Member]
      
Share-based compensation, aggregate disclosures [Abstract]      
Vesting rights With respect to outstanding restricted share grants, generally one-half of the shares vest on the third anniversary of the grant. The remaining one-half of the shares vest in one-third increments upon attainment of pre-defined levels of appreciation in the market value of the Company's Class A Common Stock. Additionally, restricted shares cannot vest until the first anniversary of the grant date. Unvested restricted shares generally expire on the earlier of five years from the date of grant, upon employment termination, or within specified time limits following voluntary employment termination (with the consent of the Company), retirement or death.    
Award expiration Unvested restricted shares generally expire on the earlier of five years from the date of grant, upon employment termination, or within specified time limits following voluntary employment termination (with the consent of the Company), retirement or death.    
Restricted stock activity [Roll Forward]      
Non-vested at beginning of period (in shares) 541,613    
Granted (in shares) 165,710    
Vested (in shares) (148,003)    
Expired or forfeited (in shares) (7,931)    
Non-vested at end of period (in shares) 551,389 541,613  
Non-vested weighted-average grant-date fair value, beginning of period (in dollars per share) $ 33.62    
Granted, weighted-average grant-date fair value (in dollars per share) $ 31.79    
Vested, weighted-average grant-date fair value (in dollars per share) $ 35.52    
Expired or forfeited, weighted-average grant-date fair value (in dollars per share) $ 33.69    
Non-vested weighted-average grant-date fair value, end of period (in dollars per share) $ 32.56 $ 33.62  
Unrecognized compensation cost [Abstract]      
Unrecognized compensation cost on non-vested awards 3,455    
Weighted average period of recognition of unrecognized compensation cost on non-vested awards (in years) 1.6    
Non-vested options activity [Roll Forward]      
Expired or forfeited (in shares) (7,931)    
Fair value assumptions [Abstract]      
Expected volatility (in hundredths) 30.40% 30.00% 30.00%
Dividend yield (in hundredths) 1.00% 1.00% 0.80%
Average risk free interest rate (in hundredths) 0.90% 1.20% 2.30%
Weighted average expected term (in years) 2.0 2.0 2.2
Stock Options [Member]
      
Share-based compensation, aggregate disclosures [Abstract]      
Exercisable rights Outstanding stock options are generally exercisable in one-third increments upon the attainment of pre-defined levels of appreciation in the market value of the Company's Class A Common Stock    
Restricted stock activity [Roll Forward]      
Expired or forfeited (in shares) (11,714)    
Stock option activity [Roll Forward]      
Outstanding, beginning of period (in shares) 872,514    
Granted (in shares) 0    
Exercised (in shares) (10,332)    
Expired or forfeited (in shares) (21,900)    
Outstanding, end of period (in shares) 840,282 872,514  
Exercisable (in shares) 484,410    
Outstanding, weighted-average exercise price, beginning of period (in dollars per share) $ 37.02    
Granted, weighted-average exercise price (in dollars per share) $ 0    
Exercised, weighted-average exercise price (in dollars per share) $ 25.64    
Expired or forfeited, weighted-average exercise price (in dollars per share) $ 37.28    
Outstanding, weighted-average exercise price, end of period (in dollars per share) $ 37.15 $ 37.02  
Exercisable, weighted-average exercise price (in dollars per share) $ 36.00    
Outstanding, weighted-average remaining contractual term (in years) 3.0    
Outstanding, aggregate intrinsic value 0    
Exercisable, weighted-average remaining contractual term (in years) 2.8    
Exercisable, aggregate intrinsic value 0    
Fair value of shares earned 0 3,120  
Intrinsic value of options exercised 57 743 747
Non-vested options activity [Roll Forward]      
Non-vested at beginning of period (in shares) 367,586    
Granted (in shares) 0    
Vested (in shares) 0    
Expired or forfeited (in shares) (11,714)    
Non-vested at end of period (in shares) 355,872 367,586  
Non-vested, weighted-average grant-date fair value, beginning of period (in dollars per share) $ 11.38    
Granted, weighted-average grant-date fair value (in dollars per share) $ 0    
Vested, weighted-average grant-date fair value (in dollars per share) $ 0    
Expired or forfeited, weighted-average grant-date fair value (in dollars per share) $ 12.28    
Non-vested, weighted-average grant-date fair value, end of period (in dollars per share) $ 11.35 $ 11.38  
Director Fee Plan [Member]
      
Share-based compensation, aggregate disclosures [Abstract]      
Maximum number of shares available for grants or awards (in shares) 300,000    
Director Fee Plan, aggregate disclosures [Abstract]      
Annual retainer fee paid to non-employee directors 60    
Annual retainer fee paid to non-employee Chairman of the Board 130    
Shares deferred under the Director Fee Plan (in shares) 15,067    
Value of annual stock-based grant $ 80    
Total stock options granted to date (in shares) 22,300    
Option awards outstanding and vested (in shares) 11,800    
Total restricted stock awards granted to date (in shares) 83,046    
Restricted stock awards unvested (in shares) 29,288