Severance, Restructuring and Acquisition Integration Activities - Summary of Severance Activity (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended		6 Months Ended
	Dec. 31, 2014	Sep. 28, 2014	Jun. 29, 2014	Mar. 30, 2014	Dec. 31, 2013	Sep. 29, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Jun. 29, 2014
Restructuring Cost and Reserve [Line Items]
New charges	$ 22,000	$ 9,200	$ 38,200	$ 1,400	$ 5,400	$ 5,900	$ 7,700	$ 800	$ 70,827	$ 14,900
Employee Severance [Member] | Productivity Improvement Program [Member]
Restructuring Cost and Reserve [Line Items]
Beginning balance	7,997	8,671
New charges	3,048	2,575									10,507
Cash payments	(2,244)	(1,171)									(1,774)
Foreign currency translation	(465)	(381)									(62)
Other adjustments	(1,195)	(1,697)
Ending balance	7,141	7,997	8,671						7,141		8,671
Employee Severance [Member] | Grass Valley Integration [Member]
Restructuring Cost and Reserve [Line Items]
Beginning balance	7,812	12,113
New charges	1,761	1,536									16,528
Cash payments	(4,699)	(3,746)									(4,497)
Foreign currency translation	(218)	(191)									82
Other adjustments		(1,900)
Ending balance	$ 4,656	$ 7,812	$ 12,113						$ 4,656		$ 12,113