Gift Cards - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 30, 2016	Jan. 31, 2015	Jan. 30, 2016	Jan. 31, 2015	May. 02, 2015
Gift Cards [Line Items]
Gift card breakage	$ 13,522	$ 10,126	$ 24,110	$ 21,259
Gift card liabilities	$ 384,915	$ 390,102	$ 384,915	$ 390,102	$ 358,146