Stockholders' Equity - Reclassified from AOCI (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 28, 2019	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018
Amounts Reclassified from AOCI
Operating expenses	$ (110,270)	$ (110,497)	$ (333,545)	$ (324,310)
Income before income taxes	21,866	22,307	38,031	59,063
Income tax expense (benefit)	1,685	(5,454)	28,481	(9,383)
Net income	20,181	27,761	9,550	68,446
Reclassifications From Accumulated Other Comprehensive Income (Loss)
Amounts Reclassified from AOCI
Income before income taxes	14	(131)	(417)	(213)
Income tax expense (benefit)	3	(28)	(88)	(45)
Net income	11	(103)	(329)	(168)
Reclassifications From Accumulated Other Comprehensive Income (Loss) \| Gains (losses) on available-for-sales securities
Amounts Reclassified from AOCI
Interest income and other, net	188		188	(49)
Reclassifications From Accumulated Other Comprehensive Income (Loss) \| Losses on cash flow hedges
Amounts Reclassified from AOCI
Operating expenses	$ (174)	$ (131)	$ (605)	$ (164)

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

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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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Amount after accretion (amortization) of discount (premium), and investment expense, of interest income and dividend income on nonoperating securities.

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Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders.

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Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Includes selling, general and administrative expense.

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