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Schedule of Segment Reporting Information by Segment Charges (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jul. 01, 2018 | Jun. 30, 2019 | Jul. 01, 2018
Segment Reporting Information [Line Items] |  |  |  |
Acquisition related costs | $ 500 | $ 2,500 | $ 1,800 | $ 3,300
Restructuring and other-employee severance | (10,404) | 2,389 | (5,292) | 2,076
Contingent consideration adjustment | 11,700 | 3,500 | (8,701) | (8,468)
Universal Robots (UR) |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Contingent consideration adjustment |  | 24,600 |  |
Semiconductor Test |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Cost of revenues-inventory charge | 2,278 | 1,613 | 3,452 | 3,779
Semiconductor Test | Severance And Benefits |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Restructuring and other-employee severance | 357 | 2,179 | 924 | 5,940
System Test |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Cost of revenues-inventory charge | 295 | 256 | 763 | 576
Industrial Automation |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Acquisition related costs | 434 |  | 1,695 |
Cost of revenues-inventory charge |  |  | 416 |
Restructuring and other-employee severance |  | 218 |  | 338
Industrial Automation | Severance And Benefits |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Restructuring and other-employee severance | 202 |  | 297 |
Wireless Test |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Cost of revenues-inventory charge | 829 | 627 | 1,168 | 1,463
Corporate And Eliminations | Restructuring and other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Acquisition related costs |  | 2,544 |  | 3,318
Corporate And Eliminations | Universal Robots (UR) | Restructuring and other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Contingent consideration adjustment |  | $ (3,500) |  | $ (8,468)
Corporate And Eliminations | Mobile Industrial Robots (MiR) | Restructuring and other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Contingent consideration adjustment | $ (11,671) |  | $ (8,668) |

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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=116868678&loc=d3e1043-128460 + Details
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- Definition Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e7008-128479 + Details
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- Definition Amount of restructuring charges, remediation cost, and asset impairment loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.3) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 + Details
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