Other Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Sep. 30, 2011
Other Liabilities
Net accrued retirement benefits, less amounts recognized within accrued liabilities	$ 62,205	$ 61,994
Uncertain tax positions, net of offsetting benefits (Note 16)	14,798	14,078
Other	13,586	12,622
Other liabilities, net	$ 90,589	$ 88,694