Investments And Restricted Investments (Amortized Cost And Fair Value Of Available-For-Sale Securities) (Details) (USD $) In Thousands, unless otherwise specified	Aug. 03, 2013	Feb. 02, 2013	Jul. 28, 2012
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	$ 7,701	$ 10,099	$ 10,646
Unrealized gains	686	915	1,047
Unrealized losses	(12)	(14)	(45)
Fair value	8,375	11,000	11,648
Short-term	159	2,362	1,711
Long-term	8,216	8,638	9,937
Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	3,853	4,991	5,529
Unrealized gains	387	484	512
Unrealized losses	(12)	(14)	(45)
Fair value	4,228	5,461	5,996
Short-term	13	1,087	1,456
Long-term	4,215	4,374	4,540
Investments [Member] | Corporate Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	3,712	4,715	5,104
Unrealized gains	378	468	490
Unrealized losses	(12)	(14)	(45)
Fair value	4,078	5,169	5,549
Short-term	0	1,013	1,424
Long-term	4,078	4,156	4,125
Investments [Member] | Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	141	276	425
Unrealized gains	9	16	22
Unrealized losses	0	0	0
Fair value	150	292	447
Short-term	13	74	32
Long-term	137	218	415
Restricted Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	3,848	5,108	5,117
Unrealized gains	299	431	535
Unrealized losses	0	0	0
Fair value	4,147	5,539	5,652
Short-term	146	1,275	255
Long-term	4,001	4,264	5,397
Restricted Investments [Member] | Corporate Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	110	1,360	1,358
Unrealized gains	7	34	67
Unrealized losses	0	0	0
Fair value	117	1,394	1,425
Short-term	0	1,275	255
Long-term	117	119	1,170
Restricted Investments [Member] | U.S. Government And Agency Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	3,738	3,748	3,759
Unrealized gains	292	397	468
Unrealized losses	0	0	0
Fair value	4,030	4,145	4,227
Short-term	146	0	0
Long-term	$ 3,884	$ 4,145	$ 4,227