Supplemental Executive Retirement Plan (Details) (USD $)	3 Months Ended		6 Months Ended		12 Months Ended
	Jul. 30, 2011	Jul. 31, 2010	Jul. 30, 2011	Jul. 31, 2010	Jan. 29, 2011
Net periodic benefit cost
Service costs		$ 69,000		$ 138,000	$ 69,000
Interest costs	659,000	558,000	1,316,000	1,116,000	2,177,000
Net amortization of unrecognized prior service cost	242,000	186,000	630,000	622,000
Net amortization of actuarial losses	545,000	140,000	1,134,000	280,000
Curtailment expense	1,242,000		1,242,000	5,819,000
Net periodic defined benefit pension cost	2,688,000	953,000	4,322,000	7,975,000
Cash surrender values of the insurance policies held in a rabbi trust	35,300,000		35,300,000		32,900,000
Gain (loss) as a result of the change in value of the insurance policy investments, included in other income and expense	(1,100,000)	(600,000)	400,000	600,000
Reconciliation of the changes in the projected benefit obligation
Balance at the begining of the period			47,772,000	37,165,000
Service costs		69,000		138,000	69,000
Interest costs	659,000	558,000	1,316,000	1,116,000	2,177,000
Actuarial Losses			1,609,000		8,361,000
Balance at the end of the period	$ 50,697,000		$ 50,697,000		$ 47,772,000