Restructuring and Related Charges - Activities in Restructuring Accrual (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 28, 2013	Mar. 29, 2013	Jun. 28, 2013
Restructuring Cost and Reserve [Line Items]
Beginning Balance
Restructuring charges in continuing operations			742
Adjustments to restructuring provisions			131
Cash payments			(698)
Non-cash write-offs			(149)
Ending Balance	26		26
Severance [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance
Restructuring charges in continuing operations			641
Adjustments to restructuring provisions			83
Cash payments			(698)
Non-cash write-offs
Ending Balance	26		26
Impairment of Leasehold improvement [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance
Restructuring charges in continuing operations			101
Adjustments to restructuring provisions			48
Cash payments
Non-cash write-offs			(149)
Ending Balance
Omneon Restructuring [Member] | Excess Facilities [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance		869	869
Cash payments			(897)
Accretion			28
Ending Balance
HFC business [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance
Restructuring charges in discontinued operations	200	400	527
Adjustments to restructuring provisions			74
Cash payments			(436)
Ending Balance	165		165
HFC business [Member] | Severance [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance
Restructuring charges in discontinued operations			403
Adjustments to restructuring provisions			103
Cash payments			(341)
Ending Balance	165		165
HFC business [Member] | Contract termination [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance
Restructuring charges in discontinued operations			124
Adjustments to restructuring provisions			(29)
Cash payments			(95)
Ending Balance