Pension Plans (Details) (Defined Benefit Pension Plans, USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Defined Benefit Pension Plans
Components of net periodic pension cost (benefit)
Service cost	$ 134	$ 127	$ 410	$ 381
Interest cost	2,197	2,389	6,658	7,167
Expected return on plan assets	(2,876)	(2,521)	(8,710)	(7,563)
Amortization of actuarial loss	445	397	1,352	1,191
Administrative expenses	19	21	57	63
Net pension cost (benefit)	$ (81)	$ 413	$ (233)	$ 1,239