Other Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Sep. 30, 2012
Other Liabilities
Net accrued retirement benefits, less amounts recognized within accrued liabilities	$ 78,423	$ 80,341
Uncertain tax positions, net of offsetting benefits (Note 16)	15,407	15,061
Other	21,556	14,041
Other liabilities, net	$ 115,386	$ 109,443