Quarterly report pursuant to Section 13 or 15(d)

Income Taxes (Details)

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Income Taxes (Details) (USD $)
3 Months Ended 9 Months Ended
Sep. 29, 2012
Oct. 01, 2011
Sep. 29, 2012
Oct. 01, 2011
Dec. 31, 2011
Income Taxes (Textual) [Abstract]          
Penalties or interest liability accrued $ 0   $ 0   $ 0
Penalties or interest expense $ 0 $ 0 $ 0 $ 0  
Effective tax rate 33.20% 11.20% 32.10% 24.80%