Line of Credit - Additional Information (Detail) (USD $)	1 Months Ended	3 Months Ended			6 Months Ended
	Feb. 29, 2012	Aug. 03, 2013	Jul. 28, 2012	Apr. 28, 2012	Aug. 03, 2013	Jul. 28, 2012
Line of Credit Facility [Line Items]
Loss on extinguishment of debt						$ (1,237,000)
Senior Secured Asset Based Revolving Credit Facility
Line of Credit Facility [Line Items]
Loss on extinguishment of debt				1,200,000
Line of credit, borrowing capacity		225,000,000			225,000,000
Line of credit, availability		0			0
Line of credit, borrowings		0	0		0	0
Line of credit, Principal amounts outstanding due date		2017-03			2017-03
Line of credit, commitment fee	0.50%
Senior Secured Asset Based Revolving Credit Facility | Federal Funds Effective Rate
Line of Credit Facility [Line Items]
Line of credit, interest rate					0.50%
Senior Secured Asset Based Revolving Credit Facility | One Month Adjusted London Interbank Offered Rate
Line of Credit Facility [Line Items]
Line of credit, interest rate					1.00%
Senior Secured Asset Based Revolving Credit Facility | Maximum
Line of Credit Facility [Line Items]
Line of credit, additional commitments					125,000,000
Senior Secured Asset Based Revolving Credit Facility | Commercial and Standby Letters of Credit
Line of Credit Facility [Line Items]
Line of credit, outstanding		39,900,000			39,900,000
Line of credit, borrowings		$ 139,400,000
Senior Secured Asset Based Revolving Credit Facility | After Amendment
Line of Credit Facility [Line Items]
Line of credit, commitment fee					0.375%