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Schedule of Segment Reporting Information by Segment Charges (Detail) - USD ($) $ in Thousands	3 Months Ended
	Apr. 02, 2017	Apr. 03, 2016
Segment Reporting Information [Line Items]
Restructuring and other	$ 2,511	$ 1,587
Contingent consideration adjustment	634	1,173
Universal Robots
Segment Reporting Information [Line Items]
Contingent consideration adjustment	600	1,200
Semiconductor Test
Segment Reporting Information [Line Items]
Cost of revenues-inventory charge	1,319	3,685
Restructuring and other	(265)	414
Corporate And Eliminations
Segment Reporting Information [Line Items]
Restructuring and other	205
Corporate And Eliminations | Universal Robots | Restructuring and other
Segment Reporting Information [Line Items]
Contingent consideration adjustment	634	1,173
Industrial Automation
Segment Reporting Information [Line Items]
Restructuring and other	624
Wireless Test
Segment Reporting Information [Line Items]
Cost of revenues-inventory charge	522	$ 605
Restructuring and other	$ 1,313

X

- Definition

Cost of revenues-provision for excess and obsolete inventory.

+ References

No definition available.

+ Details

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X

- 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/2003/role/presentationRef
-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

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- Definition

Amount of restructuring charges, remediation cost, and asset impairment loss.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.3)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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