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SUPPLEMENTAL BALANCE SHEET INFORMATION - Composition of Inventories (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 26, 2015
Supplemental Balance Sheet Information [Abstract]    
Raw materials and supplies $ 18,893 $ 15,998
Work in process 13,681 12,101
Finished products 63,259 65,636
Inventories $ 95,833 $ 93,735