Investments And Restricted Investments (Maturities Of Investment And Restricted Investment Securities) (Details) (USD $) In Thousands, unless otherwise specified	Jan. 31, 2015	Feb. 01, 2014
Investments and Restricted Investments [Line Items]
Total, Cost basis	$ 6,930	$ 19,227
Fair value	7,438	19,825
Investments [Member]
Investments and Restricted Investments [Line Items]
Maturing in one year or less, Cost basis	500
Maturing after one year through five years, Cost basis	2,867
Total, Cost basis	3,367	15,389
Maturing in one year or less, Estimated fair value	500
Maturing after one year through five years, Estimated fair value	3,110
Fair value	3,610	15,716
Restricted Investments [Member]
Investments and Restricted Investments [Line Items]
Maturing in one year or less, Cost basis	0
Maturing after one year through five years, Cost basis	3,563
Total, Cost basis	3,563	3,838
Maturing in one year or less, Estimated fair value	0
Maturing after one year through five years, Estimated fair value	3,828
Fair value	$ 3,828	$ 4,109