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Accrued Liabilities (Warranties) (Details) - USD ($)
$ in Thousands
3 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Accrued Liabilities    
Warranties, beginning of period $ 13,741 $ 16,916
Warranty Expense 3,236 2,283
Reductions for settling warranties (3,469) (2,959)
Foreign currency exchange rate changes (138) (364)
Warranties, end of period $ 13,370 $ 15,876