Description of Company and Basis of Presentation - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended			3 Months Ended	6 Months Ended	1 Months Ended
	Aug. 03, 2013 Store	Jul. 28, 2012	Aug. 03, 2013 Store	Jul. 28, 2012	Feb. 02, 2013 Store	Jul. 28, 2012 Pro Forma	Jul. 28, 2012 Pro Forma	May 03, 2012 IPO Class A common stock	May 09, 2012 IPO Class A common stock	May 03, 2012 IPO Class A common stock Company	May 03, 2012 IPO Class A common stock Stockholders	May 09, 2012 IPO Class A common stock Stockholders	May 09, 2012 IPO Class A common stock Overallotment Option Exercise By Underwriters
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Number of Stores	182		182		168
Stock issued									9,200,000	7,600,000	400,000	1,600,000	1,200,000
Stock issued, price per share									$ 15.50
Net proceed from issuance of initial public offering				$ 106,783,000				$ 106,783,000
Underwriting discount								8,700,000
Fees and expenses								2,500,000
Repayment of note issued to shareholders											$ 84,000,000
Effective Tax Rate	40.30%	33.60%	40.30%	33.60%		40.00%	40.00%
Adjustment to diluted weighted average shares outstanding	353,000		343,000	457,000			12,000