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Deferred Compensation Plan for Directors (Details Textual) (USD $)
12 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2010
Deferred Compensation Plan For Directors (Textual) [Abstract]      
Number of shares credited to directors deferred fee account 121,348 129,776  
Outstanding deferred balance $ 2,676,160 $ 2,665,583  
Total expenses charged to the company's results of operations $ 417,347 $ 443,456 $ 359,628