Stock-Based Compensation Expense - Summary of Stock Option Activity (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	9 Months Ended
	Sep. 28, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding, Shares	6,138
Granted, Shares	1,412
Exercised, Shares	(1,133)
Forfeited or expired, Shares	(190)
Outstanding, Shares	6,227
Exercisable as of September 28, 2014, Shares	2,276
Options vested or expected to vest at September 28, 2014, Shares	5,657	[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	$ 39.16
Exercised, Weighted-Average Exercise Price, in dollars per share	$ 13.81
Forfeited or expired, Weighted-Average Exercise Price, in dollars per share	$ 21.42
Outstanding, Weighted-Average Exercise Price, in dollars per share	$ 21.14
Outstanding, Weighted Average Exercise Price	$ 21.14
Exercisable as of September 28, 2014, Weighted-Average Exercise Price, in dollars per share	$ 13.21
Options vested or expected to vest at September 28, 2014, Weighted-Average Exercise Price, in dollars per share	$ 20.34	[1]
Outstanding, Weighted-Average Remaining Contractual Term	7 years 2 months 0 days
Exercisable, Weighted-Average Remaining Contractual Term	5 years 4 months 28 days
Options vested or expected to vest, Weighted-Average Remaining Contractual Term	7 years 0 months 1 day	[1]
Outstanding, Aggregate Intrinsic Value	$ 126,966
Exercisable, Aggregate Intrinsic Value	64,411
Options vested or expected to vest, Aggregate Intrinsic Value	$ 119,889	[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.