CONDENSED CONSOLIDATED STATEMENT OF COMPREHNSIVE 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
Net income	$ 119,046	$ 151,573	$ 179,483	$ 286,792
Net change in unrealized gains on available-for-sale securities	1,111	3,871	1,009	5,079
Less: reclassification adjustments for net realized gains on available-for-sale securities included in net income	(208)	(320)	(340)	(401)
Income tax expense related to net unrealized and net realized gains on available-for-sale securities	(191)	(238)	(124)	(515)
Other comprehensive income, net of tax	712	3,313	545	4,163
Total comprehensive income	$ 119,758	$ 154,886	$ 180,028	$ 290,955