Changes in Carrying Amount of Goodwill by Segment (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jul. 03, 2022	Dec. 31, 2021
Goodwill [Line Items]
Goodwill	$ 1,160,299	$ 1,188,590
Accumulated impairment losses	(762,566)	(762,566)
Total goodwill	397,733	426,024
Foreign currency translation adjustment	(28,291)
Industrial Automation
Goodwill [Line Items]
Goodwill	377,746	405,971
Total goodwill	377,746	405,971
Foreign currency translation adjustment	(28,225)
Wireless Test
Goodwill [Line Items]
Goodwill	361,819	361,819
Accumulated impairment losses	(353,843)	(353,843)
Total goodwill	7,976	7,976
Foreign currency translation adjustment	0
Semiconductor Test
Goodwill [Line Items]
Goodwill	262,035	262,101
Accumulated impairment losses	(260,540)	(260,540)
Total goodwill	1,495	1,561
Foreign currency translation adjustment	(66)
System Test
Goodwill [Line Items]
Goodwill	158,699	158,699
Accumulated impairment losses	(148,183)	(148,183)
Total goodwill	10,516	$ 10,516
Foreign currency translation adjustment	$ 0