Income Taxes Income Taxes (Details Textual) (USD $)	3 Months Ended		6 Months Ended
	Jun. 29, 2013	Jun. 30, 2012	Jun. 29, 2013	Jun. 30, 2012
Income Tax Disclosure [Abstract]
Income tax expense	$ 28,203,000	$ 9,337,000	$ 643,000	$ 17,480,000
Tax benefit from release of uncertain tax position from previous business combination	33,700,000		33,700,000
Tax benefit for fiscal 2012 federal research tax credit			$ 5,900,000