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)

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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