Severance, Restructuring and Acquisition Integration Activities - Summary of Significant Severance Activity (Detail) - USD ($) $ in Thousands	3 Months Ended				9 Months Ended
	Oct. 02, 2016	Jul. 03, 2016	Apr. 03, 2016	Sep. 27, 2015	Oct. 02, 2016	Sep. 27, 2015
Restructuring Cost and Reserve [Line Items]
New charges	$ 12,795			$ 14,143	$ 27,072	$ 33,533
Grass Valley Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
New charges	100				5,100
Industrial Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
New charges	2,600				8,400
Employee Severance [Member] | Grass Valley Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Beginning balance	3,719	$ 7,197	$ 12,076		12,076
New charges	148	251	886
Cash payments	(1,945)	(3,356)	(4,404)
Foreign currency translation	32	(13)	167
Other adjustments	(262)	(360)	(1,528)
Ending balance	1,692	3,719	7,197		1,692
Employee Severance [Member] | Industrial Restructuring Program [Member]
Restructuring Cost and Reserve [Line Items]
Beginning balance	3,755	3,993	2,947		2,947
New charges	1,287	1,489	2,919
Cash payments	(743)	(1,685)	(1,967)
Foreign currency translation	51	(42)	94
Other adjustments	0	0	0
Ending balance	$ 4,350	$ 3,755	$ 3,993		$ 4,350