Benefit Plans (Details) (USD $)	3 Months Ended
	May 04, 2013	Apr. 28, 2012
Benefit Plans
Employer contributions to pension plan	$ 700,000
Expected employer contributions to pension plan for remainder of current fiscal year	2,000,000
Components of net periodic benefit costs:
Service cost	1,059,000	817,000
Interest cost	1,696,000	1,823,000
Net actuarial loss	753,000	1,283,000
Amortization of prior service cost	24,000	157,000
Plan curtailment gain	(1,480,000)
Net periodic benefit costs	$ 2,052,000	$ 4,080,000