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Income Taxes Income Taxes (Details 1) (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 Tax Contingency        
Provision for income taxes $ 41,871 $ 129,296 $ 100,051 $ 352,453
Effective Tax Rate 35.40% 35.70% 32.90% 33.30%