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Venture Capital Investments and Marketable Securities - Additional Information (Details) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 25, 2016 | Jun. 27, 2015 | Jun. 25, 2016 | Jun. 27, 2015
Schedule of Equity Method Investments [Line Items] |  |  |  |
Committed contribution | $ 80,600,000 |  | $ 80,600,000 |
Committed contributions funded | 34,000,000 |  | 34,000,000 |
Dividends received | 0 | $ 2,100,000 | $ 0 | $ 2,100,000
Gain (loss) from venture capital investments | $ 5,000,000 | $ (900,000) |  |
Minimum |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Ownership percentage | 2.70% |  | 2.70% |
Maximum |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Ownership percentage | 12.00% |  | 12.00% |

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