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Inventories (Details) - USD ($)
$ in Thousands
Sep. 30, 2016
Sep. 30, 2015
Inventory Disclosure [Abstract]    
Finished goods $ 40,260 $ 55,074
Work in process 8,272 5,632
Raw material 65,682 70,769
Obsolescence reserve (9,674) (6,675)
Total $ 104,540 $ 124,800