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Accrued Liabilities (Warranties) (Details) - USD ($)
$ in Thousands
9 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Accrued Liabilities    
Warranties, beginning of period $ 13,741 $ 16,916
Warranty Expense 7,362 6,651
Reductions for settling warranties (6,015) (9,245)
Foreign currency exchange rate changes 95 (632)
Warranties, end of period $ 15,183 $ 13,690