Other Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Other Liabilities
Net accrued retirement benefits, less amounts recognized within accrued liabilities	$ 39,956	$ 80,341
Total unrecognized tax benefits, net of offsetting adjustments	20,343	15,061
Acquired performance obligations and unfavorable contracts	13,951	0
Other	21,260	14,041
Other liabilities, net	$ 95,510	$ 109,443