Property and Equipment (Detail) (USD $) In Thousands, unless otherwise specified	Jan. 31, 2015	Feb. 01, 2014
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 236,302	$ 202,369
Less: accumulated depreciation	115,974	99,430
Total property and equipment	120,328	102,939
Furniture and Fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	63,743	55,097
Equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	16,419	15,470
Leasehold Improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	81,839	64,638
Hardware And Software
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	62,925	55,708
Construction in Progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 11,376	$ 11,456