Goodwill and Identified Intangible Assets - Summary of Goodwill and Identified Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 27, 2013	Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 221,704	$ 221,704
Accumulated Amortization	(183,826)	(163,257)
Total	37,878	58,447
Developed core technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	136,145	136,145
Accumulated Amortization	(116,918)	(102,449)
Total	19,227	33,696
Customer relationships/contracts [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	67,098	67,098
Accumulated Amortization	(52,381)	(48,150)
Total	14,717	18,948
Trademarks and tradenames [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	11,361	11,361
Accumulated Amortization	(10,210)	(9,145)
Total	1,151	2,216
Maintenance agreements and related relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	7,100	7,100
Accumulated Amortization	(4,317)	(3,513)
Total	$ 2,783	$ 3,587