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Inventories (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Sep. 30, 2014
Inventory Disclosure [Abstract]    
Finished goods $ 48,872us-gaap_InventoryFinishedGoods $ 42,473us-gaap_InventoryFinishedGoods
Work-in-process 20,764us-gaap_InventoryWorkInProcess 28,582us-gaap_InventoryWorkInProcess
Raw materials 86,108us-gaap_InventoryRawMaterials 82,599us-gaap_InventoryRawMaterials
Obsolescence reserve (8,470)us-gaap_InventoryValuationReserves (7,764)us-gaap_InventoryValuationReserves
Total $ 147,274us-gaap_InventoryNet $ 145,890us-gaap_InventoryNet