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Changes in Carrying Amount of Goodwill by Segment (Detail) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 | Jun. 30, 2024
Goodwill [Line Items] |  |
Goodwill | $ 1,178,218 | $ 1,167,676
Accumulated impairment losses | (762,566) | (762,566)
Foreign currency translation adjustment | (10,542) |
Total Goodwill | 415,652 | 405,110
Robotics |  |
Goodwill [Line Items] |  |
Goodwill | 395,463 | 385,031
Accumulated impairment losses | 0 | 0
Foreign currency translation adjustment | (10,433) |
Total Goodwill | 395,463 | 385,031
Wireless Test |  |
Goodwill [Line Items] |  |
Goodwill | 361,819 | 361,819
Accumulated impairment losses | (353,843) | (353,843)
Foreign currency translation adjustment | 0 |
Total Goodwill | 7,976 | 7,976
Semiconductor Test |  |
Goodwill [Line Items] |  |
Goodwill | 262,237 | 262,128
Accumulated impairment losses | (260,540) | (260,540)
Foreign currency translation adjustment | (109) |
Total Goodwill | 1,697 | 1,588
System Test |  |
Goodwill [Line Items] |  |
Goodwill | 158,699 | 158,699
Accumulated impairment losses | (148,183) | (148,183)
Foreign currency translation adjustment | 0 |
Total Goodwill | $ 10,516 | $ 10,516

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