CONDENSED CONSOLIDATED STATEMENT OF COMPREHNSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Oct. 28, 2012	Oct. 30, 2011	Oct. 28, 2012	Oct. 30, 2011
Net income	$ 209,080	$ 178,273	$ 388,563	$ 465,065
Net change in unrealized gains (losses) on available-for-sale securities	(364)	(5,357)	646	(278)
Less: reclassification adjustments for net realized gains on available-for-sale securities included in net income	(47)	(174)	(387)	(575)
Income tax expense (benefit) related to net unrealized and net realized gains on available-for-sale securities	111	94	(13)	(421)
Other comprehensive income (loss), net of tax	(300)	(5,437)	246	(1,274)
Total comprehensive income	$ 208,780	$ 172,836	$ 388,809	$ 463,791