Quarterly report pursuant to Section 13 or 15(d)

Inventories (Details)

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Inventories (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Sep. 30, 2017
Inventories, net [Abstract]    
Raw materials $ 30,622 $ 29,396
Work in process 64,645 61,917
Finished goods 84,069 80,132
Inventories $ 179,336 $ 171,445