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Accrued Liabilities (Warranties) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Accrued Liabilities    
Warranties, beginning of period $ 16,916us-gaap_ProductWarrantyAccrualClassifiedCurrent $ 15,224us-gaap_ProductWarrantyAccrualClassifiedCurrent
Warranty Expense 2,283us-gaap_ProductWarrantyExpense 2,520us-gaap_ProductWarrantyExpense
Reductions for settling warranties (2,959)us-gaap_ProductWarrantyAccrualPayments (1,703)us-gaap_ProductWarrantyAccrualPayments
Foreign currency exchange rate changes (364)us-gaap_ProductWarrantyAccrualCurrencyTranslationIncreaseDecrease 195us-gaap_ProductWarrantyAccrualCurrencyTranslationIncreaseDecrease
Warranties, end of period $ 15,876us-gaap_ProductWarrantyAccrualClassifiedCurrent $ 16,236us-gaap_ProductWarrantyAccrualClassifiedCurrent