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Changes in Carrying Amount of Goodwill by Segment (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Jul. 03, 2016 | Oct. 02, 2016 | Dec. 31, 2015
Goodwill [Line Items] |  |  |
Foreign currency translation adjustment |  | $ 5,122 |
Goodwill impairment loss |  | 254,946 |
Goodwill |  | 1,001,155 | $ 996,033
Accumulated impairment losses |  | (762,566) | (507,620)
Goodwill |  | 238,589 | 488,413
Semiconductor Test |  |  |
Goodwill [Line Items] |  |  |
Goodwill |  | 260,540 | 260,540
Accumulated impairment losses |  | (260,540) | (260,540)
Industrial Automation |  |  |
Goodwill [Line Items] |  |  |
Foreign currency translation adjustment |  | 5,122 |
Goodwill |  | 220,097 | 214,975
Goodwill |  | 220,097 | 214,975
System Test |  |  |
Goodwill [Line Items] |  |  |
Goodwill |  | 158,699 | 158,699
Accumulated impairment losses |  | (148,183) | (148,183)
Goodwill |  | 10,516 | 10,516
Wireless Test |  |  |
Goodwill [Line Items] |  |  |
Goodwill impairment loss | $ 254,946 | 254,946 |
Goodwill |  | 361,819 | 361,819
Accumulated impairment losses |  | (353,843) | (98,897)
Goodwill | $ 7,976 | $ 7,976 | $ 262,922

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=64834752&loc=SL49117168-202975 + Details
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