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Inventories - Inventories (Detail) - USD ($)
$ in Thousands
Jun. 27, 2015
Dec. 27, 2014
Inventory Disclosure [Abstract]    
Bulk product $ 78,812 $ 65,603
Finished product 116,182 105,117
Packaging materials 3,788 2,803
Total $ 198,782 $ 173,523