Equity (Detail) - USD ($) $ in Thousands			3 Months Ended		12 Months Ended
		Feb. 04, 2018	May 05, 2018	Apr. 29, 2017	Feb. 03, 2018
Equity [Line Items]
Beginning Balance		$ 377,550	$ 377,550	$ 313,687	$ 313,687
Retained earnings adjustment	[1]		(888)
Comprehensive income			9,122	12,694
Share transactions under employee equity compensation plans			1,526	1,486
Ending Balance		$ 377,550	$ 387,310	$ 327,867	$ 377,550

[1] Due to the adoption of Accounting Standards Update No 2014-09, "Revenue from Contracts with Customers (ASC 606)," the opening balance of retained earnings has been reduced by $0.9 million for fiscal year 2018. There was no adjustment made to retained earnings for fiscal 2019. See footnote 2.