Quarterly report pursuant to Section 13 or 15(d)

Inventories (Details)

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Inventories (Details) - USD ($)
$ in Thousands
Jun. 30, 2018
Sep. 30, 2017
Inventory Disclosure [Abstract]    
Inventory valuation reserves $ 10,700 $ 9,800
Inventories, net of reserves:    
Raw materials 9,638 8,973
Work in process 14,712 18,543
Finished goods 145,251 147,035
Inventories, net $ 169,601 $ 174,551