Commitments and Contingencies - Summary of Warranty Accrual Included in Accrued Liabilities (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jul. 01, 2016	Jul. 03, 2015	Jul. 01, 2016	Jul. 03, 2015
Commitments and Contingencies Disclosure [Abstract]
Balance at beginning of period	$ 4,966	$ 4,091	$ 3,913	$ 4,242
Balance assumed from TVN acquisition	0		1,012
Accrual for current period warranties	1,716	1,530	2,975	3,125
Product Warranty Accrual, Preexisting, Increase (Decrease)	(74)	(92)	(74)	(92)
Warranty costs incurred	(1,513)	(1,362)	(2,731)	(3,108)
Balance at end of period	$ 5,095	$ 4,167	$ 5,095	$ 4,167

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- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph ((c)(5))
-URI http://asc.fasb.org/extlink&oid=51674963&loc=d3e12565-110249

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.15(5))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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- Definition

Total liability for standard and extended product warranties acquired in a business acquisition.

+ References

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- Definition

Represents the aggregate Increase or Decrease in the liability during the reporting period for accruals related to preexisting standard and extended product warranties (including adjustments for changes in estimates).

+ References

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Represents the aggregate increase in the liability for accruals related to standard and extended product warranties issued during the reporting period.

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Represents the aggregate decrease in the liability for payments made (in cash or in kind) to satisfy claims under the terms of the standard product warranty. Does not include any Increase or Decrease in the liability for payments related to extended product warranties.

+ References

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