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INVENTORIES (Details) - USD ($)
$ in Thousands
Jul. 02, 2016
Dec. 31, 2015
Inventory at FIFO    
Finished products $ 15,795 $ 16,637
Materials and work in process 68,818 64,641
Gross inventories 84,613 81,278
Less: LIFO reserve (43,260) (42,061)
Less: excess and obsolescence reserve (2,570) (2,118)
Net inventories $ 38,783 $ 37,099