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Property and Equipment (Parenthetical) (Detail) - USD ($)
$ in Thousands
Jan. 29, 2017
Jan. 31, 2016
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 2,509,322 $ 2,341,120
New Inventory And Order Management System Currently Under Development    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross   $ 77,600