Other Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Sep. 30, 2011
Other Liabilities
Net accrued retirement benefits, less amounts recognized with accrued liabilities	$ 61,678	$ 61,994
Uncertain tax positions, net of offsetting benefits (Note 16)	14,606	14,078
Other	11,106	12,622
Other liabilities, net	$ 87,390	$ 88,694