Stock-Based Compensation Expense - Summary of Stock Option Activity (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Apr. 02, 2017	Apr. 02, 2017
Shares (in thousands)
Outstanding, shares	6,433
Granted, shares	1,849
Exercised, shares	(1,087)
Forfeited or expired, shares	(29)
Outstanding, shares	7,166
Exercisable as of reporting date, shares		2,256
Options vested or expected to vest as of reporting date, shares		6,167
Weighted- Average Exercise Price
Outstanding, in dollars per share	$ 32.16
Granted, in dollars per share	76.78
Exercised, in dollars per share	26.81
Forfeited or expired, in dollars per share	36.01
Outstanding, in dollars per share	44.47
Outstanding	$ 32.16	$ 44.47
Exercisable as of reporting date, Weighted-Average Exercise Price, in dollars per share		26.49
Weighted- Average Remaining Contractual Term (in years)		$ 42.66
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Outstanding, in years	8 years 7 days
Exercisable, in years	5 years 11 months 12 days
Options vested or expected to vest, in years	7 years 9 months 26 days
Aggregate Intrinsic Value (in thousands)
Outstanding, in dollars		$ 282,876
Exercisable, in dollars		129,647
Options vested or expected to vest, in dollars		$ 254,614