Severance, Restructuring and Acquisition Integration Activities - Summary of Significant Severance Activity (Detail) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jul. 03, 2016	Apr. 03, 2016	Jun. 28, 2015	Jul. 03, 2016	Jun. 28, 2015
Restructuring Cost and Reserve [Line Items]
Severance, restructuring, and acquisition integration costs	$ 5,869		$ 4,907	$ 14,277	$ 19,390
Grass Valley Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Severance, restructuring, and acquisition integration costs	900			5,000
Industrial Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Severance, restructuring, and acquisition integration costs	2,400			5,800
Employee Severance [Member] | Grass Valley Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Beginning balance	7,197	$ 12,076		12,076
Severance, restructuring, and acquisition integration costs	251	886
Cash payments	(3,356)	(4,404)
Foreign currency translation	(13)	167
Other adjustments	(360)	(1,528)
Ending balance	3,719	7,197		3,719
Employee Severance [Member] | Industrial Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Beginning balance	3,993	2,947		2,947
Severance, restructuring, and acquisition integration costs	1,489	2,919
Cash payments	(1,685)	(1,967)
Foreign currency translation	(42)	94
Ending balance	$ 3,755	$ 3,993		$ 3,755