Discontinued Operations (Detail) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Aug. 31, 2015	Jan. 28, 2017	Jan. 30, 2016	Jan. 28, 2017	Jan. 30, 2016
Discontinued Operations and Disposal Groups [Abstract]
Proceeds from the sale including working capital adjustment	$ 716,886
Percentage of common units obtained	10.00%
Ratio of acquirer cash inflows to cash outflows at which common units obtained begin participating in distributions	2.5
Transition services agreement, period of involvement	24 months
Net sales from discontinued operations			$ 0		$ 168,504
Net loss from discontinued operations		$ 3,229	$ 750	$ 3,229	$ (1,500)