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Stock Award Plans (Details) (USD $)
12 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting period 5 years    
Contractual term of award 10 years    
Shares authorized to be reserved 5,000,000    
Shares available for issuance 4,357,600    
Unrecognized compensation cost for stock options, net of forfeitures $ 740,000    
Weighted average remaining period (years) 2 years 1 month 6 days    
Shares issued 630,735    
Fair market value at date of grant at restricted stock 10,700,000    
Compensation cost for stock options 473,000 848,000 1,087,000
Weighted average assumptions      
Annual dividend yield 0.00% 2.34% 1.89%
Expected volatility 0.00% 31.00% 30.00%
Risk-free interest rate 0.00% 0.77% 2.00%
Expected life 0 years 4 years 6 months 4 years 6 months
Restricted Stock [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares issued 834,935    
Fair market value at date of grant at restricted stock 14,200,000    
Compensation cost for stock options $ 2,815,049 $ 1,992,000 $ 1,537,000
Minimum | Restricted Stock [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting period 1 year    
Maximum | Restricted Stock [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting period 7 years