Pensions and Other Post-retirement Benefits (Details) (USD $)	3 Months Ended		9 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Components of Net Periodic Benefit Cost
Interest cost	$ 1,105,000	$ 1,103,000	$ 3,315,000	$ 3,309,000
Expected return on plan assets	(1,496,000)	(1,293,000)	(4,488,000)	(3,878,000)
Recognized net actuarial loss	685,000	863,000	2,055,000	2,587,000
Net pension expense	294,000	673,000	882,000	2,018,000
Employer contribution			$ 2,100,000