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Discontinued Operations (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Oct. 02, 2011
Sep. 30, 2012
Oct. 02, 2011
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Net sales $ 9,210 $ 24,385 $ 57,017 $ 77,581
Income (Loss) on operations before taxes on income (25,875) 732 (26,062) 2,380
Tax expense (benefit) (9,035) 256 (9,106) 833
Income (Loss) on operations, net of tax $ (16,840) $ 476 $ (16,956) $ 1,547