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Venture Capital Investments and Marketable Securities - Additional Information (Details) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jul. 01, 2017 | Jun. 25, 2016 | Jul. 01, 2017 | Jun. 25, 2016
Schedule of Equity Method Investments [Line Items] |  |  |  |
Committed contribution | $ 87,700,000 |  | $ 87,700,000 |
Venture capital investments | 45,500,000 |  | 45,500,000 |
Dividends received | 0 | $ 0 | 4,400,000 | $ 0
Gain (loss) from venture capital investments | $ 2,500,000 | $ 5,000,000 | $ 6,700,000 | $ 8,100,000
Minimum |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Ownership percentage | 0.70% |  | 0.70% |
Maximum |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Ownership percentage | 12.00% |  | 12.00% |

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