Investments And Restricted Investments (Maturities Of Investment And Restricted Investment Securities) (Details) (USD $) In Thousands, unless otherwise specified	Oct. 27, 2012	Jan. 28, 2012	Oct. 29, 2011
Investments and Restricted Investments [Line Items]
Total, Cost basis	$ 10,535	$ 10,934	$ 11,010
Total, Estimated fair value	11,526	11,911	11,833
Investments [Member]
Investments and Restricted Investments [Line Items]
Maturing in one year or less, Cost basis	1,503
Maturing after one year through five years, Cost basis	2,821
Maturing after five years through ten years, Cost basis	1,099
Total, Cost basis	5,423	5,808	5,879
Maturing in one year or less, Estimated fair value	1,533
Maturing after one year through five years, Estimated fair value	3,040
Maturing after five through ten years, Estimated fair value	1,357
Total, Estimated fair value	5,930	6,260	6,282
Restricted Investments [Member]
Investments and Restricted Investments [Line Items]
Maturing in one year or less, Cost basis	1,249
Maturing after one year through five years, Cost basis	253
Maturing after five years through ten years, Cost basis	3,610
Total, Cost basis	5,112	5,126	5,131
Maturing in one year or less, Estimated fair value	1,290
Maturing after one year through five years, Estimated fair value	268
Maturing after five through ten years, Estimated fair value	4,038
Total, Estimated fair value	$ 5,596	$ 5,651	$ 5,551