Stock-Based Awards - Stock Options (Details) - Stock Options $ / shares in Units, $ in Thousands	12 Months Ended
	Jan. 25, 2020 USD ($) $ / shares shares
Stock Options, Outstanding [Roll Forward]
Beginning balance (in shares) | shares	583,291
Granted (in shares) | shares	39,276
Options exercised (in shares) | shares	(45,258)
Canceled (in shares) | shares	0
Ending balance (in shares) | shares	577,309
Exercisable options (in shares) | shares	497,739
Stock Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Beginning balance (in dollars per shares) | $ / shares	$ 34.24
Options granted (in dollars per shares) | $ / shares	45.94
Options exercised (in dollars per shares) | $ / shares	11.11
Canceled (in dollars per shares) | $ / shares	0
Ending balance (in dollars per shares) | $ / shares	36.85
Weighted average remaining contractual life, shares exercisable (In years) | $ / shares	$ 31.44
Weighted Average Remaining Contractual Life (In years), outstanding	4 years 1 month 6 days
Aggregate Intrinsic Value (In thousands), outstanding | $	$ 9,485
Weighted Average Remaining Contractual Life (In years). exercisable	3 years 4 months 24 days
Aggregate Intrinsic Value (In thousands), exercisable | $	$ 9,485