Pensions and Other Post-retirement Benefits (Details) (USD $)	3 Months Ended		6 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013
Components of Net Periodic Benefit Cost
Interest cost	$ 1,201,000	$ 1,105,000	$ 2,402,000	$ 2,210,000
Expected return on plan assets	(1,664,000)	(1,496,000)	(3,328,000)	(2,992,000)
Recognized net actuarial loss	229,000	685,000	458,000	1,370,000
Net pension expense	(234,000)	294,000	(468,000)	588,000
Plan assets
Employer contribution			2,500,000
Maximum
Plan assets
Estimated additional contribution in remainder of fiscal 2014			$ 2,000,000