Stock-Based Compensation Expense - Summary of Stock Option Activity (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	6 Months Ended
	Jun. 29, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding, Shares	6,138
Granted, Shares	1,311
Exercised, Shares	(635)
Forfeited or expired, Shares	(138)
Outstanding, Shares	6,676
Exercisable as of June 29, 2014, Shares	2,744
Options vested or expected to vest at June 29, 2014, Shares	6,026	[1]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Outstanding, Weighted-Average Exercise Price, in dollars per share	$ 15.65
Granted, Weighted-Average Exercise Price, in dollars per share	$ 38.89
Exercised, Weighted-Average Exercise Price, in dollars per share	$ 14.20
Forfeited or expired, Weighted-Average Exercise Price, in dollars per share	$ 19.55
Outstanding, Weighted-Average Exercise Price, in dollars per share	$ 20.27
Exercisable as of June 29, 2014, Weighted-Average Exercise Price, in dollars per share	$ 13.13
Options vested or expected to vest at June 29, 2014, Weighted-Average Exercise Price, in dollars per share	$ 19.44	[1]
Outstanding, Weighted-Average Remaining Contractual Term	7 years 3 months 0 days
Exercisable, Weighted-Average Remaining Contractual Term	5 years 7 months 28 days
Options vested or expected to vest, Weighted-Average Remaining Contractual Term	7 years 1 month 1 day	[1]
Outstanding, Aggregate Intrinsic Value	$ 118,374
Exercisable, Aggregate Intrinsic Value	67,421
Options vested or expected to vest, Aggregate Intrinsic Value	$ 111,631	[1]

[1] In addition to the vested options, the Company expects a portion of the unvested options to vest at some point in the future. Options expected to vest are calculated by applying an estimated forfeiture rate to the unvested options.