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Accrued Liabilities (Accrued Liabilities) (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2012
Sep. 30, 2011
Accrued Liabilities    
Salaries and other member benefits $ 30,710 $ 70,965
Current portion of restructuring and other charges 2,429 2,489
Warranties 13,783 14,083
Interest payable 11,357 11,611
Accrued retirement benefits 2,423 2,560
Deferred revenues 5,870 8,160
Taxes, other than income 7,377 5,097
Other 18,952 18,551
Accrued liabilities $ 92,901 $ 133,516