Investments And Restricted Investments (Amortized Cost And Fair Value Of Available-For-Sale Securities) (Details) (USD $)	12 Months Ended
	Jan. 31, 2015	Feb. 01, 2014	Feb. 02, 2013
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	$ 6,930,000	$ 19,227,000
Unrealized gains	513,000	602,000
Unrealized losses	(5,000)	(4,000)
Fair value	7,438,000	19,825,000
Short-term	500,000	12,266,000
Long-term	6,938,000	7,559,000
Increase Decrease in available for sale securities	(100,000)	(300,000)	(100,000)
Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	3,367,000	15,389,000
Unrealized gains	248,000	331,000
Unrealized losses	(5,000)	(4,000)
Fair value	3,610,000	15,716,000
Short-term	500,000	12,006,000
Long-term	3,110,000	3,710,000
Investments [Member] | Corporate Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	3,298,000	3,298,000
Unrealized gains	243,000	325,000
Unrealized losses	(5,000)	(4,000)
Fair value	3,536,000	3,619,000
Short-term	500,000	0
Long-term	3,036,000	3,619,000
Investments [Member] | U.S. Government And Agency Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost		12,005,000
Unrealized gains		1,000
Unrealized losses		0
Fair value		12,006,000
Short-term		12,006,000
Long-term		0
Investments [Member] | Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	69,000	86,000
Unrealized gains	5,000	5,000
Unrealized losses	0	0
Fair value	74,000	91,000
Short-term	0	0
Long-term	74,000	91,000
Restricted Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	3,563,000	3,838,000
Unrealized gains	265,000	271,000
Unrealized losses	0	0
Fair value	3,828,000	4,109,000
Short-term	0	260,000
Long-term	3,828,000	3,849,000
Restricted Investments [Member] | Corporate Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost		110,000
Unrealized gains		5,000
Unrealized losses		0
Fair value		115,000
Short-term		115,000
Long-term		0
Restricted Investments [Member] | U.S. Government And Agency Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	3,563,000	3,728,000
Unrealized gains	265,000	266,000
Unrealized losses	0	0
Fair value	3,828,000	3,994,000
Short-term	0	145,000
Long-term	$ 3,828,000	$ 3,849,000