Quarterly report pursuant to Section 13 or 15(d)

Inventories (Details)

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Inventories (Details) - USD ($)
$ in Thousands
Dec. 30, 2017
Sep. 30, 2017
Inventory Disclosure [Abstract]    
Inventory valuation reserves $ 9,900 $ 9,800
Inventories, net of reserves:    
Raw materials 8,639 8,973
Work in process 16,179 18,543
Finished goods 149,687 147,035
Inventories, net $ 174,505 $ 174,551