Stock-Based Compensation Expense - Summary of Stock Option Activity (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	9 Months Ended
	Oct. 04, 2015	Oct. 04, 2015
Shares (in thousands)
Outstanding, shares	6,812
Granted, shares	1,458
Exercised, shares	(1,509)
Forfeited or expired, shares	(80)
Outstanding, shares	6,681
Exercisable as of October 4, 2015, shares		2,517
Options vested or expected to vest as of October 4, 2015, shares		6,018
Weighted- Average Exercise Price
Outstanding, in dollars per share	$ 23.26
Granted, in dollars per share	41.25
Exercised, in dollars per share	18.18
Forfeited or expired, in dollars per share	30.47
Outstanding, in dollars per share	28.25
Outstanding	$ 23.26	$ 28.25
Exercisable as of October 4, 2015, Weighted-Average Exercise Price, in dollars per share		17.02
Weighted- Average Remaining Contractual Term (in years)		$ 27.17
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Outstanding, in years	7 years 3 months
Exercisable, in years	5 years 6 months
Options vested or expected to vest, in years	7 years 2 months
Aggregate Intrinsic Value (in thousands)
Outstanding, in dollars		$ 64,101
Exercisable, in dollars		47,219
Options vested or expected to vest, in dollars		$ 62,906