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Summary of Significant Accounting Policies - Supplemental Cash Flow Information (Detail) - USD ($) $ in Thousands | 9 Months Ended |  |
--- | --- | --- | ---
Sep. 28, 2019 | Sep. 29, 2018 | Dec. 29, 2018 | Dec. 30, 2017
Accounting Policies [Abstract] |  |  |  |
Interest | $ 134 | $ 184 |  |
Income taxes | 34,123 | 29,003 |  |
Payments against operating lease liabilities | 5,076 | 0 |  |
ROU assets obtained in exchange for lease liabilities(1) | 25,965 | 0 |  |
Unpaid purchases of property, plant and equipment | 4,170 | 2,023 |  |
Unsettled common stock proceeds from option exercises | 0 | 259 |  |
Cash and cash equivalents | 633,400 |  |  |
Restricted cash | 152 | 157 |  |
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents | $ 513,512 | $ 493,645 | $ 552,641 | $ 315,483

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