Significant Accounting Policies - Computation of Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Jan. 31, 2021	Jan. 26, 2020	Jan. 27, 2019
Earnings Per Share, Basic and Diluted [Abstract]
Net income attributable to common stockholders	$ 59,903	$ 31,871	$ 69,639
Weighted average common shares outstanding–basic	65,208	66,263	65,982
Dilutive effect of share-based compensation	851	1,155	2,499
Weighted average common shares outstanding–diluted	66,059	67,418	68,481
Basic earnings (loss) per common share (in dollars per share)	$ 0.92	$ 0.48	$ 1.06
Diluted earnings (loss) per common share (in dollars per share)	$ 0.91	$ 0.47	$ 1.02
Anti-dilutive shares not included in the above calculations	406	120	553