Changes in Carrying Amount of Goodwill by Segment (Detail) - USD ($) $ in Thousands |
12 Months Ended | |
---|---|---|
Dec. 31, 2019 |
Mar. 29, 2020 |
|
Goodwill [Line Items] | ||
Foreign currency translation adjustment | $ (6,349) | |
Goodwill | 1,178,997 | $ 1,172,499 |
Accumulated impairment losses | (762,566) | (762,566) |
Goodwill | 416,431 | 409,933 |
Autoguide LLC | ||
Goodwill [Line Items] | ||
Goodwill | (149) | |
Industrial Automation | ||
Goodwill [Line Items] | ||
Foreign currency translation adjustment | (6,354) | |
Goodwill | 396,483 | 389,980 |
Goodwill | 396,483 | 389,980 |
Wireless Test | ||
Goodwill [Line Items] | ||
Goodwill | 361,819 | 361,819 |
Accumulated impairment losses | (353,843) | (353,843) |
Goodwill | 7,976 | 7,976 |
Semiconductor Test | ||
Goodwill [Line Items] | ||
Foreign currency translation adjustment | 5 | |
Goodwill | 261,996 | 262,001 |
Accumulated impairment losses | (260,540) | (260,540) |
Goodwill | 1,456 | 1,461 |
System Test | ||
Goodwill [Line Items] | ||
Goodwill | 158,699 | 158,699 |
Accumulated impairment losses | (148,183) | (148,183) |
Goodwill | $ 10,516 | $ 10,516 |