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. 26, 2020	Jan. 26, 2018
Number of Shares
Beginning balance (in shares)		877
Options granted (in shares)		0
Options exercised (in shares)		(242)
Options cancelled/forfeited (in shares)		(11)
Ending balance (in shares)		624
Exercisable at end of the period (in shares)		428
Options vested and expected to vest after period end (in shares)		624
Weighted Average Exercise Price (per share)
Beginning balance (in dollars per share)		$ 29.03
Options granted (in dollars per share)		0
Options exercised (in dollars per share)		25.22
Options cancelled/forfeited (in dollars per share)		41.71
Ending balance (in dollars per share)		30.26
Exercisable at end of the period (in dollars per share)		25.26
Options vested and expected to vest after period end (in dollars per share)		$ 30.26
Aggregate Intrinsic Value
Beginning balance	[1]	$ 18,226
Options exercised	[1]	5,877
Ending balance	[1]	13,895
Exercisable at end of the period	[1]	11,661
Vested and expected to vest after period end	[1]	$ 13,895
Number of Shares Exercisable
Beginning balance (in shares)		472
Ending balance (in shares)		428
Weighted Average Contractual Term
Exercisable at end of the period		2 years 1 month 6 days
Vested and expected to vest after period end		2 years 8 months 12 days
Closing price of common stock (usd per share)			$ 52.52

[1] The aggregate intrinsic value of stock options vested and exercisable and vested and expected to vest as of January 26, 2020 is calculated based on the difference between the exercise price and the $52.52 closing price of the Company's common stock as of January 26, 2020.