Supplemental Executive Retirement Plan (Details) (USD $)	3 Months Ended		6 Months Ended
	Jul. 28, 2012	Jul. 30, 2011	Jul. 28, 2012	Jul. 30, 2011	Jan. 28, 2012
Components of net periodic benefit cost
Interest cost	$ 598,000	$ 659,000	$ 1,196,000	$ 1,316,000
Net amortization of unrecognized prior service cost	155,000	242,000	310,000	630,000
Net amortization of actuarial losses	835,000	545,000	1,670,000	1,134,000
Curtailment expense		1,242,000		1,242,000
Net periodic defined benefit pension cost	1,588,000	2,688,000	3,176,000	4,322,000
Cash surrender values of the insurance policies held in a rabbi trust	39,100,000		39,100,000		38,400,000
Gain (loss) as a result of the change in value of the insurance policy investments, included in other income and expense	$ (500,000)	$ (1,100,000)	$ 700,000	$ 400,000