Nature of Business and Basis of Presentation - Summary of Changes Made to Consolidated Balance Sheet (Detail) - USD ($) $ in Thousands	Aug. 03, 2019	Feb. 03, 2019	Feb. 02, 2019
Assets
Prepaid expenses and other current assets	$ 11,789	$ 9,058	$ 14,797
Operating lease right-of-use assets	306,056	297,326
Deferred tax assets, net	6,502	7,604	5,259
Other long-term assets	8,374	5,086	7,180
Liabilities
Deferred rent and tenant allowances			7,489
Operating lease liabilities	58,646	52,958
Long-term deferred rent and tenant allowances			37,076
Long-term operating lease liabilities	293,450	289,721
Shareholders’ equity
Retained earnings	$ 260,156	250,338	$ 256,614
Accounting Standards Update 2016-02 [Member]
Assets
Prepaid expenses and other current assets		(5,739)
Operating lease right-of-use assets		297,326
Deferred tax assets, net		2,345
Other long-term assets		(2,094)
Liabilities
Deferred rent and tenant allowances		(7,489)
Operating lease liabilities		52,958
Long-term deferred rent and tenant allowances		(37,076)
Long-term operating lease liabilities		289,721
Shareholders’ equity
Retained earnings		$ (6,276)