Investments And Restricted Investments (Amortized Cost And Fair Value Of Available-For-Sale Securities) (Details) (USD $) In Thousands, unless otherwise specified	Feb. 02, 2013	Jan. 28, 2012
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	$ 10,099	$ 10,934
Unrealized gains	915	1,055
Unrealized losses	(14)	(78)
Fair value	11,000	11,911
Short-term	2,362	658
Long-term	8,638	11,253
Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	4,991	5,808
Unrealized gains	484	530
Unrealized losses	(14)	(78)
Fair value	5,461	6,260
Short-term	1,087	658
Long-term	4,374	5,602
Investments [Member] | Corporate Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	4,715	5,080
Unrealized gains	468	501
Unrealized losses	(14)	(78)
Fair value	5,169	5,503
Short-term	1,013	401
Long-term	4,156	5,102
Investments [Member] | Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	276	728
Unrealized gains	16	29
Unrealized losses	0	0
Fair value	292	757
Short-term	74	257
Long-term	218	500
Restricted Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	5,108	5,126
Unrealized gains	431	525
Unrealized losses	0	0
Fair value	5,539	5,651
Short-term	1,275	0
Long-term	4,264	5,651
Restricted Investments [Member] | Corporate Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	1,360	1,357
Unrealized gains	34	94
Unrealized losses	0	0
Fair value	1,394	1,451
Short-term	1,275	0
Long-term	119	1,451
Restricted Investments [Member] | U.S. Government And Agency Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	3,748	3,769
Unrealized gains	397	431
Unrealized losses	0	0
Fair value	4,145	4,200
Short-term	0	0
Long-term	$ 4,145	$ 4,200