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Inventories - Inventories (Detail) - USD ($)
$ in Thousands
Sep. 29, 2018
Dec. 30, 2017
Inventory Disclosure [Abstract]    
Bulk product $ 93,142 $ 82,010
Finished product 143,118 126,827
Packaging materials 3,697 3,312
Total $ 239,957 $ 212,149