Schedule of Amortizable Intangible Assets (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Oct. 04, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets
Gross Carrying Amount	$ 543,613	$ 523,052
Accumulated Amortization	283,319	332,452
Net Carrying Amount	$ 260,294	$ 190,600
Weighted Average Useful Life, years	6 years 8 months 12 days	6 years 9 months 18 days
Developed technology
Finite-Lived Intangible Assets
Gross Carrying Amount	$ 381,071	$ 345,513
Accumulated Amortization	206,256	224,059
Net Carrying Amount	$ 174,815	$ 121,454
Weighted Average Useful Life, years	6 years	6 years 2 months 12 days
Customer Relationships
Finite-Lived Intangible Assets
Gross Carrying Amount	$ 110,464	$ 146,635
Accumulated Amortization	59,395	93,998
Net Carrying Amount	$ 51,069	$ 52,637
Weighted Average Useful Life, years	7 years 10 months 24 days	7 years 8 months 12 days
Trademarks and tradenames
Finite-Lived Intangible Assets
Gross Carrying Amount	$ 51,588	$ 30,414
Accumulated Amortization	17,418	14,205
Net Carrying Amount	$ 34,170	$ 16,209
Weighted Average Useful Life, years	9 years 6 months	9 years
Non-compete agreement
Finite-Lived Intangible Assets
Gross Carrying Amount	$ 320	$ 320
Accumulated Amortization	80	20
Net Carrying Amount	$ 240	$ 300
Weighted Average Useful Life, years	4 years	4 years
Customer order backlog
Finite-Lived Intangible Assets
Gross Carrying Amount	$ 170	$ 170
Accumulated Amortization	$ 170	$ 170
Weighted Average Useful Life, years	3 months 18 days	3 months 18 days