Restructuring and Related Charges - Activities in Restructuring Accrual (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 29, 2013
Restructuring Cost and Reserve [Line Items]
Beginning Balance
Restructuring charges in continuing operations	565
Cash payments	(247)
Non-cash write-offs	(101)
Ending balance	217
Severance [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance
Restructuring charges in continuing operations	464
Cash payments	(247)
Non-cash write-offs
Ending balance	217
Impairment of Leasehold improvements [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance
Restructuring charges in continuing operations	101
Cash payments
Non-cash write-offs	(101)
Ending balance
Omneon Restructuring [Member] | Excess Facilities [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	869
Cash payments	(455)
Accretion	20
Ending balance	434
HFC business [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance
Restructuring charges in discontinued operations	367
Cash payments	(165)
Ending balance	202
HFC business [Member] | Severance [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance
Restructuring charges in discontinued operations	243
Cash payments	(165)
Ending balance	78
HFC business [Member] | Contract termination [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance
Restructuring charges in discontinued operations	124
Cash payments
Ending balance	$ 124