Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Jan. 30, 2016	Aug. 01, 2015	Jan. 24, 2015	Jan. 30, 2016	Jan. 24, 2015
Income Tax Disclosure [Abstract]
Effective income tax rate	33.40%		33.10%	41.10%	34.20%
Repatriation of foreign earnings		$ 200,000
Tax impact of repatriation of foreign earnings					$ 12,300