Quarterly report pursuant to Section 13 or 15(d)

Inventories (Details)

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Inventories (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Sep. 30, 2017
Inventory Disclosure [Abstract]    
Inventory valuation reserves $ 10,600 $ 9,800
Inventories, net of reserves:    
Raw materials 10,681 8,973
Work in process 14,058 18,543
Finished goods 147,474 147,035
Inventories, net $ 172,213 $ 174,551