Investments And Restricted Investments (Amortized Cost And Fair Value Of Available-For-Sale Securities) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended	12 Months Ended
	Nov. 02, 2013	Oct. 27, 2012	Feb. 02, 2013
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	$ 19,696	$ 10,535	$ 10,099
Unrealized gains	677	1,009	915
Unrealized losses	(7)	(18)	(14)
Fair value	20,366	11,526	11,000
Short-term	12,161	2,823	2,362
Long-term	8,205	8,703	8,638
Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	15,853	5,423	4,991
Unrealized gains	382	525	484
Unrealized losses	(7)	(18)	(14)
Fair value	16,228	5,930	5,461
Short-term	12,016	1,533	1,087
Long-term	4,212	4,397	4,374
Investments [Member] | Corporate Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	3,710	5,102	4,715
Unrealized gains	372	507	468
Unrealized losses	(7)	(18)	(14)
Fair value	4,075	5,591	5,169
Short-term	0	1,413	1,013
Long-term	4,075	4,178	4,156
Investments [Member] | U.S. Government And Agency Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	12,012
Unrealized gains	1
Unrealized losses	0
Fair value	12,013
Short-term	12,013
Long-term	0
Investments [Member] | Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	131	321	276
Unrealized gains	9	18	16
Unrealized losses	0	0	0
Fair value	140	339	292
Short-term	3	120	74
Long-term	137	219	218
Restricted Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	3,843	5,112	5,108
Unrealized gains	295	484	431
Unrealized losses	0	0	0
Fair value	4,138	5,596	5,539
Short-term	145	1,290	1,275
Long-term	3,993	4,306	4,264
Restricted Investments [Member] | Corporate Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	110	1,358	1,360
Unrealized gains	6	52	34
Unrealized losses	0	0	0
Fair value	116	1,410	1,394
Short-term	0	1,290	1,275
Long-term	116	120	119
Restricted Investments [Member] | U.S. Government And Agency Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	3,733	3,754	3,748
Unrealized gains	289	432	397
Unrealized losses	0	0	0
Fair value	4,022	4,186	4,145
Short-term	145	0	0
Long-term	$ 3,877	$ 4,186	$ 4,145