Significant Accounting Policies (Components Of Comprehensive Income) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Jan. 29, 2012	Oct. 30, 2011	Jul. 31, 2011	May 01, 2011	Jan. 30, 2011	Oct. 31, 2010	Aug. 01, 2010	May 02, 2010	Jan. 29, 2012	Jan. 30, 2011	Jan. 31, 2010
Significant Accounting Policies [Abstract]
Net income	$ 12,388	$ 26,979	$ 27,138	$ 22,582	$ 26,003	$ 16,105	$ 19,662	$ 10,802	$ 89,087	$ 72,572	$ 957
Change in net unrealized holding (loss) gain on available-for-sale investments									(204)	(76)	83
Gain for translation adjustment									(4)	1	5
Total comprehensive income									88,879	72,497	1,045
Gain realized upon reclassification from Comprehensive Income									$ 5		$ 217