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INVENTORIES (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 28, 2015
Dec. 31, 2014
Inventory at FIFO    
Finished products $ 10,371us-gaap_InventoryFinishedGoods $ 20,083us-gaap_InventoryFinishedGoods
Materials and work in process 62,890us-gaap_InventoryWorkInProcessAndRawMaterials 68,934us-gaap_InventoryWorkInProcessAndRawMaterials
Gross inventories 73,261us-gaap_InventoryGross 89,017us-gaap_InventoryGross
Less: LIFO reserve (41,041)us-gaap_InventoryLIFOReserve (40,578)us-gaap_InventoryLIFOReserve
Less: excess and obsolescence reserve (2,928)us-gaap_InventoryValuationReserves (3,750)us-gaap_InventoryValuationReserves
Net inventories $ 29,292us-gaap_InventoryNet $ 44,689us-gaap_InventoryNet