Accrued Liabilities (Accrued Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Sep. 30, 2011
Accrued Liabilities
Salaries and other member benefits	$ 38,843	$ 70,965
Current portion of restructuring and other charges	961	2,489
Warranties	13,979	14,083
Interest payable	5,715	11,611
Accrued retirement benefits	2,555	2,560
Deferred revenues	7,881	8,160
Taxes, other than income	9,833	5,097
Other	18,789	18,551
Accrued liabilities	$ 98,556	$ 133,516