Pension Plans (Details) (Defined Benefit Pension Plans, USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Pension Plans
Components of net periodic pension cost
Service cost	$ 140	$ 127
Interest cost	2,244	2,391
Expected return on plan assets	(2,934)	(2,523)
Amortization of actuarial loss	457	398
Administrative expenses	19	21
Net pension cost	$ (74)	$ 414