Restructuring and Other - Additional Information (Detail) $ in Thousands		3 Months Ended		6 Months Ended
	Apr. 16, 2016 USD ($) Utility	Jul. 03, 2016 USD ($) Employee	Jul. 05, 2015 USD ($) Employee	Jul. 03, 2016 USD ($) Employee	Jul. 05, 2015 USD ($) Employee
Restructuring Cost and Reserve
Property insurance recovery and proceeds		$ 5,051		$ 5,051
Contingent consideration adjustment		1,300		2,478	$ (1,600)
Impairment of fixed assets and expenses related to the Japan earthquake
Restructuring Cost and Reserve
Number of remaining utilities | Utility	0
Building impairment and other expenses		5,100		5,100
Impairment of fixed assets and expenses related to the Japan earthquake | Earthquake Related Expenses [Member]
Restructuring Cost and Reserve
Building impairment and other expenses		900		900
Impairment of fixed assets and expenses related to the Japan earthquake | Buildings
Restructuring Cost and Reserve
Building impairment and other expenses		$ 4,200		$ 4,200
Earthquake
Restructuring Cost and Reserve
Earthquake insurance	$ 10,000
Insurance deductible	$ 2,500
Semiconductor Test
Restructuring Cost and Reserve
Severance benefit and charges			$ 300		$ 300
Reduction in employees headcount | Employee		15	4	27	4
Semiconductor Test and Wireless Test
Restructuring Cost and Reserve
Severance benefit and charges		$ 1,300		$ 1,700
Reduction in employees headcount | Employee		62		74
Wireless Test
Restructuring Cost and Reserve
Reduction in employees headcount | Employee		47		47
ZTEC Instruments, Inc.
Restructuring Cost and Reserve
Contingent consideration adjustment			$ (1,600)		$ (1,600)
Universal Robots
Restructuring Cost and Reserve
Contingent consideration adjustment		$ 800		$ 1,900
Acquisition related costs					$ 1,000
Avionics Interface Technologies, LLC
Restructuring Cost and Reserve
Contingent consideration adjustment		$ 600		$ 600