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Pension and Other Post-retirement Benefit Plans (Tables)
6 Months Ended
Mar. 31, 2013
Pension And Other Post-Retirement Benefit Plans Tables  
Schedule of components of net periodic benefit cost

Components of Net Periodic Benefit Cost:

    Six Months Ended March 31,  
    Pension Benefits     Other Benefits  
    2013     2012     2013     2012  
                         
Service cost   $ 197,958     $ 164,331     $ 8,643     $ 7,194  
Interest cost     357,531       385,671       23,112       20,785  
Expected return on plan assets     (443,282 )     (389,097 )            
Amortization of prior service cost     7,114       8,209       1,774       (5,846 )
Amortization of net (gain) loss     311,967       352,766       (7,771 )     (12,237 )
Net periodic benefit cost   $ 431,288     $ 521,880     $ 25,758     $ 9,896