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Goodwill by Reportable Segment (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 28, 2020 | Sep. 28, 2020 | Dec. 30, 2019
Goodwill [Line Items] |  |  |
Goodwill | $ 877,924 | $ 877,924 | $ 877,924
Accumulated impairment loss | (240,600) | (240,600) | (171,400)
Goodwill, net | 637,324 | 637,324 | 706,524
Impairment loss during the three quarters ended September 28, 2020 | (69,200) | (69,200) |
Printed Circuit Board |  |  |
Goodwill [Line Items] |  |  |
Goodwill | 700,724 | 700,724 | 700,724
Accumulated impairment loss | (171,400) | (171,400) | (171,400)
Goodwill, net | 529,324 | 529,324 | 529,324
RF&S Components |  |  |
Goodwill [Line Items] |  |  |
Goodwill | 177,200 | 177,200 | 177,200
Accumulated impairment loss | (69,200) | (69,200) |
Goodwill, net | 108,000 | 108,000 | $ 177,200
Impairment loss during the three quarters ended September 28, 2020 | $ (69,200) | $ (69,200) |

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