Pension and Other Post-retirement Benefit Plans (Details) (USD $)	9 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Pension Benefits
Service cost	$ 296,937	$ 246,496
Interest cost	536,297	578,506
Expected return on plan assets	(664,922)	(583,646)
Amortization of prior service cost	10,671	12,314
Amortization of net gain(loss)	467,950	529,149
Net periodic benefit cost (benefit)	646,933	782,819
Other Benefits
Service cost	12,964	10,791
Interest cost	34,667	31,177
Expected return on plan assets
Amortization of prior service cost	2,660	(8,768)
Amortization of net gain(loss)	(11,657)	(18,355)
Net periodic benefit cost (benefit)	$ 38,634	$ 14,845