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Investments (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 29, 2018 | Dec. 30, 2017 | Dec. 31, 2016
Investment [Line Items] |  |  |
Purchases of non-marketable investments | $ 115,839 | $ 0 | $ 0
Equity method investments, carrying amount | 118,200 | 2,500 |
Equity securities without readily determinable fair value, carrying amount | $ 500 | $ 500 |
Minimum [Member] |  |  |
Investment [Line Items] |  |  |
Equity method investment, ownership percentage | 12.00% |  |
Maximum [Member] |  |  |
Investment [Line Items] |  |  |
Equity method investment, ownership percentage | 35.00% |  |

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