Income Taxes Income Taxes (Details Textual) (USD $)	3 Months Ended
Mar. 29, 2014	Mar. 30, 2013
Income Tax Disclosure [Abstract]
Income tax expense (benefit)	$ 5,356,000	$ (27,560,000)
Estimated increase in annual effective tax rate due to expiration of research tax credit	3.00%
Tax benefit from release of uncertain tax position		33,669,000
Federal research tax credit research		$ 5,900,000

Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to research tax credit.

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-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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-Name Accounting Standards Codification

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-Glossary Income Tax Expense (or Benefit)

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to research tax credit.

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The net amount of all increases and decreases in unrecognized tax benefits for the period.

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