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Accounts Receivable, Net - Additional Information (Detail) - USD ($) $ in Thousands | Sep. 27, 2019 | Dec. 28, 2018
--- | --- | ---
Accounts Notes And Loans Receivable [Line Items] |  |
Accounts receivable, net current | $ 128,333 | $ 105,814
PG&E [Member] |  |
Accounts Notes And Loans Receivable [Line Items] |  |
Accounts receivable, net current | $ 3,000 |

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