Components of Net Pension Expense for Pension Plan (Detail) (Pension Plans, Defined Benefit, USD $) In Thousands	3 Months Ended		6 Months Ended
	Jul. 30, 2011	Jul. 31, 2010	Jul. 30, 2011	Jul. 31, 2010
Pension Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Interest expense on projected benefit obligation	$ 2,478	$ 2,371	$ 4,941	$ 4,678
Expected return on plan assets	(2,441)	(2,394)	(4,884)	(4,800)
Net amortization and deferral	208	139	417	244
Net expense (credit)	$ 245	$ 116	$ 474	$ 122