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Inventories - Inventories (Detail) - USD ($)
$ in Thousands
Sep. 28, 2019
Dec. 29, 2018
Inventory Disclosure [Abstract]    
Bulk product $ 107,816 $ 122,111
Finished product 169,868 144,897
Packaging materials 4,403 3,496
Total $ 282,087 $ 270,504