Investments And Restricted Investments (Maturities Of Investment And Restricted Investment Securities) (Details) (USD $) In Thousands, unless otherwise specified	Nov. 02, 2013	Feb. 02, 2013	Oct. 27, 2012
Investments and Restricted Investments [Line Items]
Total, Cost basis	$ 19,696	$ 10,099	$ 10,535
Total, Estimated fair value	20,366	11,000	11,526
Investments [Member]
Investments and Restricted Investments [Line Items]
Maturing in one year or less, Cost basis	12,015
Maturing after one year through five years, Cost basis	3,838
Maturing after five years through ten years, Cost basis	0
Total, Cost basis	15,853	4,991	5,423
Maturing in one year or less, Estimated fair value	12,016
Maturing after one year through five years, Estimated fair value	4,212
Maturing after five through ten years, Estimated fair value	0
Total, Estimated fair value	16,228	5,461	5,930
Restricted Investments [Member]
Investments and Restricted Investments [Line Items]
Maturing in one year or less, Cost basis	144
Maturing after one year through five years, Cost basis	807
Maturing after five years through ten years, Cost basis	2,892
Total, Cost basis	3,843	5,108	5,112
Maturing in one year or less, Estimated fair value	145
Maturing after one year through five years, Estimated fair value	890
Maturing after five through ten years, Estimated fair value	3,103
Total, Estimated fair value	$ 4,138	$ 5,539	$ 5,596