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INVENTORIES (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 29, 2013
Dec. 31, 2012
Inventory at FIFO    
Finished products $ 4,080 $ 3,615
Materials and work in process 52,073 52,212
Gross inventories 56,153 55,827 [1]
Less: LIFO reserve (38,631) (38,089) [1]
Less: excess and obsolescence reserve (1,468) (1,729) [1]
Net inventories $ 16,054 $ 16,009 [1]
[1] The balance sheet at December 31, 2012 has been derived from the audited financial statements at that date but does not include all the information and footnotes required by accounting principles generally accepted in the United States of America for complete financial statements.