Goodwill and Identified Intangible Assets - Summary of Goodwill and Identified Intangible Assets (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jul. 03, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 210,343	$ 210,343
Accumulated Amortization	(203,183)	(199,744)
Total future amortization expense	7,160	10,599
Developed core technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	136,145	136,145
Accumulated Amortization	(135,973)	(135,426)
Total future amortization expense	$ 172	719
Developed core technology [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful Life	4 years
Developed core technology [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful Life	6 years
Customer relationships/contracts [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 67,098	67,098
Accumulated Amortization	(61,218)	(58,784)
Total future amortization expense	$ 5,880	8,314
Customer relationships/contracts [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful Life	5 years
Customer relationships/contracts [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful Life	6 years
Maintenance agreements and related relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 7,100	7,100
Accumulated Amortization	(5,992)	(5,534)
Total future amortization expense	$ 1,108	$ 1,566
Maintenance agreements and related relationships [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful Life	6 years
Maintenance agreements and related relationships [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful Life	7 years