Components of Net SERP Expense (Detail) (Supplemental Executive Retirement Plan (SERP), USD $) In Thousands	3 Months Ended		6 Months Ended
	Jul. 30, 2011	Jul. 31, 2010	Jul. 30, 2011	Jul. 31, 2010
Supplemental Executive Retirement Plan (SERP)
Defined Benefit Plan Disclosure [Line Items]
Interest expense on projected benefit obligation	$ 279	$ 288	$ 556	$ 554
Net amortization and deferral	27	20	53	27
Net expense (credit)	$ 306	$ 308	$ 609	$ 581