Goodwill and Identified Intangible Assets - Summary of Goodwill and Identified Intangible Assets (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jul. 01, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 89,495	$ 45,687
Accumulated Amortization	(49,857)	(41,590)
Total future amortization expense	$ 39,638	4,097
Developed Technology
Finite-Lived Intangible Assets [Line Items]
Useful Life	3 years 8 months 12 days
Gross Carrying Amount	$ 32,489	10,987
Accumulated Amortization	(12,695)	(10,987)
Total future amortization expense	$ 19,794	0
Customer relationships/contracts [Member]
Finite-Lived Intangible Assets [Line Items]
Useful Life	4 years 4 months 24 days
Gross Carrying Amount	$ 47,286	29,200
Accumulated Amortization	(29,392)	(25,752)
Total future amortization expense	$ 17,894	3,448
Trademarks and Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Useful Life	3 years 8 months 12 days
Gross Carrying Amount	$ 603
Accumulated Amortization	(50)
Total future amortization expense	$ 553
Maintenance agreements and related relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Useful Life	2 months
Gross Carrying Amount	$ 5,500	5,500
Accumulated Amortization	(5,309)	(4,851)
Total future amortization expense	$ 191	$ 649
Backlog
Finite-Lived Intangible Assets [Line Items]
Useful Life	2 months 24 days
Gross Carrying Amount	$ 3,617
Accumulated Amortization	(2,411)
Total future amortization expense	$ 1,206