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Changes in Carrying Amount of Goodwill by Segment (Detail) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2022
Goodwill [Line Items] |  |  |
Goodwill | $ 1,188,590 | $ 1,216,425 | $ 1,165,761
Accumulated impairment losses | (762,566) | (762,566) | (762,566)
Foreign currency translation adjustment | (22,829) | (27,835) |
Total Goodwill | 426,024 | 453,859 | 403,195
Robotics |  |  |
Goodwill [Line Items] |  |  |
Goodwill | 405,971 | 433,752 | 383,166
Foreign currency translation adjustment | (22,805) | (27,781) |
Total Goodwill | 405,971 | 433,752 | 383,166
Wireless Test |  |  |
Goodwill [Line Items] |  |  |
Goodwill | 361,819 | 361,819 | 361,819
Accumulated impairment losses | (353,843) | (353,843) | (353,843)
Foreign currency translation adjustment |  | 0 |
Total Goodwill | 7,976 | 7,976 | 7,976
Semiconductor Test |  |  |
Goodwill [Line Items] |  |  |
Goodwill | 262,101 | 262,155 | 262,077
Accumulated impairment losses | (260,540) | (260,540) | (260,540)
Foreign currency translation adjustment | (24) | (54) |
Total Goodwill | 1,561 | 1,615 | 1,537
System Test |  |  |
Goodwill [Line Items] |  |  |
Goodwill | 158,699 | 158,699 | 158,699
Accumulated impairment losses | (148,183) | (148,183) | (148,183)
Foreign currency translation adjustment |  | 0 |
Total Goodwill | $ 10,516 | $ 10,516 | $ 10,516

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