Stock-Based Compensation Expense - Summary of Stock Option Activity (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	9 Months Ended
	Sep. 29, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Outstanding, Shares	7,118
Granted, Shares	1,711
Exercised, Shares	(2,275)
Forfeited or expired, Shares	(259)
Outstanding, Shares	6,295
Exercisable, Shares	1,806
Options vested or expected to vest, Shares	5,577
Outstanding, Weighted-Average Exercise Price	$ 12.78
Granted, Weighted-Average Exercise Price	$ 21.29
Exercised, Weighted-Average Exercise Price	$ 11.42
Forfeited or expired, Weighted-Average Exercise Price	$ 16.29
Outstanding, Weighted-Average Exercise Price	$ 15.44
Exercisable, Weighted-Average Exercise Price	$ 11.55
Options vested or expected to vest, Weighted-Average Exercise Price	$ 15.09
Outstanding, Weighted-Average Remaining Contractual Term (in years)	7 years 4 months 24 days
Exercisable, Weighted-Average Remaining Contractual Term (in years)	5 years 4 months 24 days
Options vested or expected to vest, Weighted-Average Remaining Contractual Term (in years)	7 years 2 months 12 days
Outstanding, Aggregate Intrinsic Value	$ 100,525
Exercisable, Aggregate Intrinsic Value	35,855
Options vested or expected to vest, Aggregate Intrinsic Value	$ 91,041