Schedule of Acquired Amortizable Intangible Assets (Detail) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jul. 02, 2017	Dec. 31, 2016
Finite-Lived Intangible Assets
Gross Carrying Amount	$ 414,208	$ 414,208
Accumulated Amortization	(322,890)	(306,868)
Cumulative Foreign Currency Translation Adjustment	(715)	(6,939)
Net Carrying Amount	90,603	100,401
Developed technology
Finite-Lived Intangible Assets
Gross Carrying Amount	270,877	270,877
Accumulated Amortization	(215,973)	(206,376)
Cumulative Foreign Currency Translation Adjustment	(524)	(5,093)
Net Carrying Amount	54,380	59,408
Customer Relationships
Finite-Lived Intangible Assets
Gross Carrying Amount	92,741	92,741
Accumulated Amortization	(81,294)	(76,707)
Cumulative Foreign Currency Translation Adjustment	(55)	(538)
Net Carrying Amount	11,392	15,496
Trademarks and tradenames
Finite-Lived Intangible Assets
Gross Carrying Amount	50,100	50,100
Accumulated Amortization	(25,233)	(23,435)
Cumulative Foreign Currency Translation Adjustment	(136)	(1,308)
Net Carrying Amount	24,731	25,357
Non-compete Agreements
Finite-Lived Intangible Assets
Gross Carrying Amount	320	320
Accumulated Amortization	(220)	(180)
Net Carrying Amount	100	140
Customer backlog
Finite-Lived Intangible Assets
Gross Carrying Amount	170	170
Accumulated Amortization	$ (170)	$ (170)