Components of Net SERP Expense (Detail) (Supplemental Executive Retirement Plan (SERP), USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Oct. 29, 2011	Oct. 30, 2010	Oct. 29, 2011	Oct. 30, 2010
Supplemental Executive Retirement Plan (SERP)
Defined Benefit Plan Disclosure [Line Items]
Interest expense on projected benefit obligation	$ 285	$ 288	$ 841	$ 842
Net amortization and deferral	29	20	82	47
Net expense (credit)	$ 314	$ 308	$ 923	$ 889