Pensions and Other Post-retirement Benefits (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Components of Net Periodic Benefit Cost
Interest cost	$ 1,116	$ 1,171
Expected return on plan assets	(1,490)	(1,743)
Recognized net actuarial loss	493	309
Net pension expense (benefit)	119	$ (263)
Employer Contributions
Employer contribution	$ 0