Restructuring and Other - Additional Information (Detail) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 04, 2015 USD ($) Employee	Sep. 28, 2014 USD ($)	Oct. 04, 2015 USD ($) Employee	Sep. 28, 2014 USD ($) Employee
Restructuring Cost and Reserve
Contingent consideration adjustment			$ (2,600)	$ (630)
Severance benefit and charges	$ 1,100		$ 1,400	$ 800
Reduction in employees headcount | Employee	18		22	30
Avionics Interface Technologies, LLC
Restructuring Cost and Reserve
Contingent consideration adjustment	$ (1,000)		$ (1,000)
Avionics Interface Technologies, LLC | Corporate And Eliminations
Restructuring Cost and Reserve
Contingent consideration adjustment			(1,000)
Universal Robots
Restructuring Cost and Reserve
Acquisition related costs	$ 100		1,100
ZTEC Instruments, Inc.
Restructuring Cost and Reserve
Contingent consideration adjustment		$ (600)	(1,600)	$ (600)
ZTEC Instruments, Inc. | Corporate And Eliminations
Restructuring Cost and Reserve
Contingent consideration adjustment			$ (1,600)