Severance, Restructuring and Acquisition Integration Activities - Summary of Severance Activity (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended		3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended
	Sep. 28, 2014	Sep. 29, 2013	Sep. 28, 2014	Sep. 29, 2013	Sep. 28, 2014 Employee Severance [Member] Productivity Improvement Program [Member]	Jun. 29, 2014 Employee Severance [Member] Productivity Improvement Program [Member]	Sep. 28, 2014 Employee Severance [Member] Grass Valley Integration [Member]	Jun. 29, 2014 Employee Severance [Member] Grass Valley Integration [Member]
Restructuring Cost and Reserve [Line Items]
Beginning balance					$ 8,671	$ 0	$ 12,113	$ 0
New charges	9,158	3,800	48,809	9,500	2,575	10,507	1,536	16,528
Cash payments					(1,171)	(1,774)	(3,746)	(4,497)
Foreign currency translation					(381)	(62)	(191)	82
Other adjustments					(1,697)		(1,900)
Ending balance					$ 7,997	$ 8,671	$ 7,812	$ 12,113