Property and Equipment (Detail) - USD ($) $ in Thousands	Jul. 29, 2017	Jan. 28, 2017	Jul. 30, 2016
Property Plant And Equipment [Abstract]
Property and equipment, at cost	$ 1,955,756	$ 1,884,297	$ 1,824,869
Less: Accumulated depreciation and impairment	(1,236,629)	(1,176,500)	(1,124,599)
Property and equipment, net	$ 719,127	$ 707,797	$ 700,270