Share-Based Compensation - Summary of the Activity for Stock Option Awards (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		12 Months Ended
		Jan. 27, 2019	Jan. 26, 2018
Number of Shares
Beginning balance (in shares)		1,345
Options granted (in shares)		147
Options exercised (in shares)		(595)
Options cancelled/forfeited (in shares)		(20)
Ending balance (in shares)		877
Exercisable at end of the period (in shares)		472
Options vested and expected to vest after period end (in shares)		877
Weighted Average Exercise Price (per share)
Beginning balance (in dollars per share)		$ 26.17
Options granted (in dollars per share)		47.99
Options exercised (in dollars per share)		27.36
Options cancelled/forfeited (in dollars per share)		26.15
Ending balance (in dollars per share)		29.03
Exercisable at end of the period (in dollars per share)		24.37
Options vested and expected to vest after period end (in dollars per share)		$ 29.03
Aggregate Intrinsic Value
Beginning balance	[1]	$ 13,953
Options exercised	[1]	12,280
Ending balance	[1]	18,226
Exercisable at end of the period	[1]	11,991
Vested and expected to vest after period end	[1]	$ 18,226
Number of Shares Exercisable
Beginning balance (in shares)		807
Ending balance (in shares)		472
Weighted Average Contractual Term
Exercisable at end of the period		2 years 3 months
Vested and expected to vest after period end		3 years 5 months
Closing price of common stock (usd per share)			$ 49.77

[1] The aggregate intrinsic value of stock options vested and exercisable and vested and expected to vest as of January 27, 2019 is calculated based on the difference between the exercise price and the closing price $49.77 of the Company's common stock on January 25, 2019.