Goodwill and Identified Intangible Assets - Summary of Goodwill and Identified Intangible Assets (Detail) - USD ($) $ in Thousands	3 Months Ended
	Apr. 01, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 90,452	$ 45,687
Accumulated Amortization	(44,410)	(41,590)
Total future amortization expense	$ 46,042	4,097
Developed Technology
Finite-Lived Intangible Assets [Line Items]
Useful Life	3 years 10 months 24 days
Gross Carrying Amount	$ 31,488	10,987
Accumulated Amortization	(11,416)	(10,987)
Total future amortization expense	$ 20,072	0
Customer relationships/contracts [Member]
Finite-Lived Intangible Assets [Line Items]
Useful Life	4 years 4 months 24 days
Gross Carrying Amount	$ 48,164	29,200
Accumulated Amortization	(27,286)	(25,752)
Total future amortization expense	$ 20,878	3,448
Trademarks and Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Useful Life	3 years 10 months 24 days
Gross Carrying Amount	$ 605
Accumulated Amortization	(13)
Total future amortization expense	$ 592
Maintenance agreements and related relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Useful Life	6 months
Gross Carrying Amount	$ 5,500	5,500
Accumulated Amortization	(5,080)	(4,851)
Total future amortization expense	$ 420	$ 649
Backlog
Finite-Lived Intangible Assets [Line Items]
Useful Life	4 months 24 days
Gross Carrying Amount	$ 3,690
Accumulated Amortization	(615)
Total future amortization expense	3,075
In Process Research and Development
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,005
Accumulated Amortization	0
Total future amortization expense	$ 1,005