Stock-Based Compensation Expense - Summary of Stock Option Activity (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Apr. 05, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding, Shares	6,812
Granted, Shares	1,399
Exercised, Shares	(586)
Forfeited or expired, Shares	(24)
Outstanding, Shares	7,601
Exercisable as of April 5, 2015, Shares	3,137
Options vested or expected to vest as of April 5, 2015, Shares	6,732	[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	$ 23.26
Granted, Weighted-Average Exercise Price, in dollars per share	$ 41.26
Exercised, Weighted-Average Exercise Price, in dollars per share	$ 16.49
Forfeited or expired, Weighted-Average Exercise Price, in dollars per share	$ 9.20
Outstanding, Weighted-Average Exercise Price, in dollars per share	$ 27.07
Outstanding, Weighted Average Exercise Price	$ 27.07
Exercisable as of April 5, 2015, Weighted-Average Exercise Price, in dollars per share	$ 16.59
Options vested or expected to vest as of April 5, 2015, Weighted-Average Exercise Price, in dollars per share	$ 25.79	[1]
Outstanding, Weighted-Average Remaining Contractual Term	7 years 7 months 0 days
Exercisable, Weighted-Average Remaining Contractual Term	5 years 9 months 1 day
Options vested or expected to vest, Weighted-Average Remaining Contractual Term	7 years 5 months 1 day	[1]
Outstanding, Aggregate Intrinsic Value	$ 178,001
Exercisable, Aggregate Intrinsic Value	106,335
Options vested or expected to vest, Aggregate Intrinsic Value	$ 166,252	[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.