Pension and Other Post-retirement Benefit Plans (Details) (USD $)	3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Pension Benefits
Service cost	$ 98,979	$ 82,165
Interest cost	178,766	192,835
Expected return on plan assets	(221,641)	(194,549)
Amortization of prior service cost	3,557	4,105
Amortization of (gain) loss	155,983	176,383
Net periodic benefit cost (benefit)	215,644	260,939
Post-retirement Benefits
Service cost	4,321	3,597
Interest cost	11,556	10,392
Expected return on plan assets
Amortization of prior service cost	887	(2,923)
Amortization of (gain) loss	(3,886)	(6,118)
Net periodic benefit cost (benefit)	$ 12,878	$ 4,948