Other Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Sep. 30, 2013
Other Liabilities
Net accrued retirement benefits, less amounts recognized within accrued liabilities	$ 37,409	$ 39,956
Total unrecognized tax benefits, net of offsetting adjustments	13,451	20,343
Acquired performance obligations and unfavorable contracts	14,622	23,951
Other	31,106	21,260
Other liabilities	$ 96,588	$ 105,510