Benefit Plan (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jul. 28, 2012	Jul. 30, 2011	Jul. 28, 2012	Jul. 30, 2011
Components of net benefit cost
Service cost	$ 63	$ 63	$ 126	$ 126
Interest cost	433	509	866	1,018
Expected return on plan assets	(483)	(544)	(966)	(1,088)
Amortization of net loss	131	4	262	8
Net periodic benefit cost	$ 144	$ 32	$ 288	$ 64