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v3.20.2

Fair Value of Financial Instruments - Narrative (Details) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 28, 2020 USD ($) company | Jun. 30, 2019 USD ($) | Jun. 28, 2020 USD ($) company | Jun. 30, 2019 USD ($) | Dec. 29, 2019 USD ($)
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |  |  |  |
Proceeds from sale of investments |  |  | $ 11,470 |  |
Number of companies quoted on an active public market | company | 1 |  | 1 |  |
Redeemable period |  |  | 45 days |  |
Minimum |  |  |  |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |  |  |  |
Redeemable period |  |  | 30 days |  |
Maximum |  |  |  |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |  |  |  |
Redeemable period |  |  | 90 days |  |
Fair Value, Recurring |  |  |  |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |  |  |  |
Fair value of investments | $ 12,837 | $ 24,358 | $ 12,837 | $ 24,358 | $ 25,518
Gain (loss) on investments | $ (780) | $ 177 | $ (1,211) | $ 727 |

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