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Changes in Carrying Amount of Goodwill by Segment (Detail) - USD ($) $ in Thousands | 9 Months Ended |  |  |
--- | --- | --- | --- | ---
Oct. 04, 2015 | Oct. 04, 2015 | Jun. 11, 2015 | Dec. 31, 2014
Goodwill [Line Items] |  |  |  |
Goodwill beginning balance | $ 273,438 |  |  |
Foreign currency translation adjustment | (2,113) |  |  |
Goodwill Ending balance | 498,346 |  |  |
Goodwill |  | $ 1,005,966 |  | $ 781,058
Accumulated impairment losses |  | (507,620) |  | (507,620)
Goodwill Ending balance | 498,346 | 498,346 |  | 273,438
Universal Robots |  |  |  |
Goodwill [Line Items] |  |  |  |
Universal Robots acquisition | 226,501 |  |  |
Universal Robots adjustment | 520 |  |  |
Goodwill Ending balance |  |  | $ 227,021 |
Wireless Test |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill beginning balance | 262,922 |  |  |
Goodwill Ending balance | 262,922 |  |  |
Goodwill |  | 361,819 |  | 361,819
Accumulated impairment losses |  | (98,897) |  | (98,897)
Goodwill Ending balance | 262,922 | 262,922 |  | 262,922
Industrial Automation |  |  |  |
Goodwill [Line Items] |  |  |  |
Foreign currency translation adjustment | (2,113) |  |  |
Goodwill Ending balance | 224,908 |  |  |
Goodwill |  | 224,908 |  |
Goodwill Ending balance | 224,908 | 224,908 |  |
Industrial Automation | Universal Robots |  |  |  |
Goodwill [Line Items] |  |  |  |
Universal Robots acquisition | 226,501 |  |  |
Universal Robots adjustment | 520 |  |  |
System Test |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill beginning balance | 10,516 |  |  |
Goodwill Ending balance | 10,516 |  |  |
Goodwill |  | 158,699 |  | 158,699
Accumulated impairment losses |  | (148,183) |  | (148,183)
Goodwill Ending balance | $ 10,516 | 10,516 |  | 10,516
Semiconductor Test |  |  |  |
Goodwill [Line Items] |  |  |  |
Goodwill |  | 260,540 |  | 260,540
Accumulated impairment losses |  | $ (260,540) |  | $ (260,540)

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