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Discontinued Operations (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 29, 2012
Sep. 24, 2011
Sep. 29, 2012
Sep. 24, 2011
Schedule of net sales and income before taxes from discontinued operations        
Net sales $ 16 $ 3,667 $ 2,908 $ 12,446
Income (loss) before taxes $ 12 $ (3,517) $ 3,125 $ (4,433)