Pensions and Other Post-retirement Benefits (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Components of Net Periodic Benefit Cost
Interest cost	$ 1,105	$ 1,103
Expected return on plan assets	(1,496)	(1,293)
Recognized net actuarial loss	685	862
Net pension expense	$ 294	$ 672