Pension and Other Post-retirement Benefit Plans (Details) (USD $)	6 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Pension Benefits
Service cost	$ 197,958	$ 164,331
Interest cost	357,531	385,671
Expected return on plan assets	(443,282)	(389,097)
Amortization of prior service cost	7,114	8,209
Amortization of net gain(loss)	311,967	352,766
Net periodic benefit cost (benefit)	431,288	521,880
Post-retirement Benefits
Service cost	8,643	7,194
Interest cost	23,112	20,785
Expected return on plan assets
Amortization of prior service cost	1,774	(5,846)
Amortization of net gain(loss)	(7,771)	(12,237)
Net periodic benefit cost (benefit)	$ 25,758	$ 9,896