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INVENTORIES (Details) - USD ($)
$ in Thousands
Apr. 02, 2016
Dec. 31, 2015
Inventory at FIFO    
Finished products $ 12,060 $ 16,637
Materials and work in process 64,955 64,641
Gross inventories 77,015 81,278
Less: LIFO reserve (42,714) (42,061)
Less: excess and obsolescence reserve (2,027) (2,118)
Net inventories $ 32,274 $ 37,099