Consolidated Condensed Statements Of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Jul. 29, 2012	Jul. 31, 2011	Jul. 29, 2012	Jul. 31, 2011
Statement of Income and Comprehensive Income [Abstract]
Net income	$ 10,022	$ 27,138	$ 12,231	$ 49,720
Other comprehensive (loss) income, before tax:
Change in net unrealized holding loss on available-for-sale investments	(9)	(83)	(33)	(130)
Change in unrealized loss on interest rate cap	(305)	0	(305)	0
Change in cumulative translation adjustment	(257)	0	119	0
Other comprehensive loss, before tax	(571)	(83)	(219)	(130)
Benefit for taxes related to items of other comprehensive (loss) income	113	19	117	29
Other comprehensive loss, net of tax	(458)	(64)	(102)	(101)
Total comprehensive income, net of tax	$ 9,564	$ 27,074	$ 12,129	$ 49,619

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