Severance, Restructuring and Acquisition Integration Activities - Summary of Severance Activity (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Oct. 02, 2016	Jul. 03, 2016	Apr. 03, 2016	Dec. 31, 2015	Sep. 27, 2015	Jun. 28, 2015	Mar. 29, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Restructuring Reserve [Roll Forward]
New charges	$ 11,700	$ 12,800	$ 5,900	$ 8,400	$ 13,600	$ 14,100	$ 4,900	$ 14,600	$ 38,770	$ 47,170	$ 70,827
Grass Valley Restructuring Program [Member]
Restructuring Reserve [Roll Forward]
New charges									8,700	25,400
Industrial Restructuring Program [Member]
Restructuring Reserve [Roll Forward]
New charges									9,700	3,300
Employee Severance [Member] | Grass Valley Restructuring Program [Member]
Restructuring Reserve [Roll Forward]
Beginning balance	1,692	3,719	7,197	12,076					12,076
New charges	749	148	251	886
Cash payments	(829)	(1,945)	(3,356)	(4,404)
Foreign currency translation	(90)	32	(13)	167
Other adjustments		(262)	(360)	(1,528)
Ending balance	1,522	1,692	3,719	7,197	12,076				1,522	12,076
Employee Severance [Member] | Industrial Restructuring Program [Member]
Restructuring Reserve [Roll Forward]
Beginning balance	4,350	3,755	3,993	2,947					2,947
New charges	885	1,287	1,489	2,919
Cash payments	(645)	(743)	(1,685)	(1,967)
Foreign currency translation	(259)	51	(42)	94
Other adjustments		0	0	0
Ending balance	$ 4,331	$ 4,350	$ 3,755	$ 3,993	$ 2,947				$ 4,331	$ 2,947