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Inventories (Details) - USD ($)
$ in Thousands
Mar. 31, 2017
Sep. 30, 2016
Inventories    
Raw Materials $ 17,662 $ 21,587
Work-in-process 127,952 118,822
Finished Goods 95,699 94,772
Other 1,440 1,377
Total $ 242,753 $ 236,558