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Income Taxes (Details) (USD $)
3 Months Ended 9 Months Ended
Sep. 26, 2012
Sep. 28, 2011
Sep. 26, 2012
Sep. 28, 2011
Income Taxes [Abstract]        
Provision for income taxes $ 3,201,000 $ 406,000 $ 10,295,000 $ 1,013,000
Effective tax rate adjustment     1,300,000  
Deferred Other Tax Expense (Benefit)     $ 800,000