Investments And Restricted Investments (Maturities Of Investment Securities) (Details) (USD $) In Thousands	Jul. 30, 2011	Jan. 29, 2011	Jul. 31, 2010
Cost basis	$ 12,813	$ 16,535	$ 20,162
Estimated fair value	13,693	17,286	21,026
Investments [Member]
Maturing in one year or less at Cost basis	915
Maturing after one year through five years at Cost basis	3,183
Maturing after five years through ten years at Cost basis	2,578
Cost basis	6,676
Maturing in one year or less at Estimated fair value	959
Maturing after one year through five years at Estimated fair value	3,277
Maturing after five through ten years at Estimated fair value	2,966
Estimated fair value	7,202
Restricted Investments [Member]
Maturing in one year or less at Cost basis	1,002
Maturing after one year through five years at Cost basis	1,499
Maturing after five years through ten years at Cost basis	3,636
Cost basis	6,137
Maturing in one year or less at Estimated fair value	1,004
Maturing after one year through five years at Estimated fair value	1,622
Maturing after five through ten years at Estimated fair value	3,865
Estimated fair value	$ 6,491