Severance, Restructuring and Acquisition Integration Activities - Summary of Severance Activity (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 29, 2015	Mar. 30, 2014	Dec. 31, 2014	Sep. 28, 2014	Jun. 29, 2014
Restructuring Cost and Reserve [Line Items]
New charges	$ 14,483us-gaap_RestructuringCharges	$ 2,295us-gaap_RestructuringCharges
Employee Severance [Member] \| Productivity Improvement Program [Member]
Restructuring Cost and Reserve [Line Items]
Beginning balance	7,141		7,997	8,671
New charges	887		3,048	2,575	10,507
Cash payments	(1,455)		(2,244)	(1,171)	(1,774)
Foreign currency translation	(367)		(465)	(381)	(62)
Other adjustments			(1,195)	(1,697)
Ending balance	6,206		7,141	7,997	8,671
Employee Severance [Member] \| Grass Valley Integration [Member]
Restructuring Cost and Reserve [Line Items]
Beginning balance	4,656		7,812	12,113
New charges	2,164		1,761	1,536	16,528
Cash payments	(2,370)		(4,699)	(3,746)	(4,497)
Foreign currency translation	(302)		(218)	(191)	82
Other adjustments				(1,900)
Ending balance	$ 4,148		$ 4,656	$ 7,812	$ 12,113

Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

+ References

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Amount of foreign currency translation adjustment increasing or decreasing the accrual for a specified type of restructuring cost.

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The amount of change in the restructuring reserve related to foreign currency translation adjustments and any other adjustments not separately disclosed or provided for elsewhere in the Taxonomy.

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