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Accrued Liabilities (Warranties) (Details) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Mar. 31, 2012
Accrued Liabilities  
Warranties, beginning of period $ 14,083
Increases to accruals related to warranties during the period 952
Settlements of amounts accrued (1,194)
Foreign currency exchange rate changes (58)
Warranties, end of period $ 13,783