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v3.21.1

Changes in Carrying Amount of Goodwill by Segment (Detail) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Apr. 04, 2021 | Dec. 31, 2020
Goodwill [Line Items] |  |
Goodwill | $ 1,200,167 | $ 1,216,425
Accumulated impairment losses | (762,566) | (762,566)
Foreign currency translation adjustment | (16,258) |
Goodwill | 437,601 | 453,859
Industrial Automation |  |
Goodwill [Line Items] |  |
Goodwill | 417,596 | 433,752
Accumulated impairment losses | 0 | 0
Foreign currency translation adjustment | (16,156) |
Goodwill | 417,596 | 433,752
System Test |  |
Goodwill [Line Items] |  |
Goodwill | 158,699 | 158,699
Accumulated impairment losses | (148,183) | (148,183)
Foreign currency translation adjustment | 0 |
Goodwill | 10,516 | 10,516
Wireless Test |  |
Goodwill [Line Items] |  |
Goodwill | 361,819 | 361,819
Accumulated impairment losses | (353,843) | (353,843)
Foreign currency translation adjustment | 0 |
Goodwill | 7,976 | 7,976
Semiconductor Test |  |
Goodwill [Line Items] |  |
Goodwill | 262,053 | 262,155
Accumulated impairment losses | (260,540) | (260,540)
Foreign currency translation adjustment | (102) |
Goodwill | $ 1,513 | $ 1,615

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