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Goodwill by Reportable Segment (Detail) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 28, 2020 | Dec. 31, 2018 | Dec. 30, 2019
Goodwill [Line Items] |  |  |
Goodwill | $ 877,924 | $ 870,178 | $ 877,924
Accumulated impairment losses | (240,600) | (171,400) | (171,400)
Goodwill, net | 637,324 | 698,778 | 706,524
Goodwill recognized during the year |  | 7,746 |
Impairment loss during the year | (69,200) |  |
Printed Circuit Board |  |  |
Goodwill [Line Items] |  |  |
Goodwill | 700,724 | 692,978 | 700,724
Accumulated impairment losses | (171,400) | (171,400) | (171,400)
Goodwill, net | 529,324 | 521,578 | 529,324
Goodwill recognized during the year |  | 7,746 |
RF&S Components |  |  |
Goodwill [Line Items] |  |  |
Goodwill | 177,200 | 177,200 | 177,200
Accumulated impairment losses | (69,200) |  |
Goodwill, net | 108,000 | $ 177,200 | $ 177,200
Impairment loss during the year | $ (69,200) |  |

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