Income Taxes - Income From Operations Before Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Dec. 29, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2016	Oct. 01, 2016	Jul. 02, 2016	Apr. 02, 2016	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
United States									$ 82,146	$ 179	$ 48,869
Foreign									35,829	64,021	73,670
Income from operations before income taxes	$ 50,183	$ (6,540)	$ (27,455)	$ 101,787	$ 21,934	$ 14,980	$ 18,070	$ 9,216	$ 117,975	$ 64,200	$ 122,539

The portion of earnings or loss from continuing operations before income taxes that is attributable to domestic operations.

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Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

+ References

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The portion of earnings or loss from continuing operations before income taxes that is attributable to foreign operations, which is defined as Income or Loss generated from operations located outside the entity's country of domicile.

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