CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Oct. 26, 2014	Oct. 27, 2013	Oct. 26, 2014	Oct. 27, 2013
Net income	$ 172,967	$ 118,734	$ 437,459	$ 293,073
Net change in unrealized gains (losses) on available-for-sale securities, net of tax	5,283	8	5,036	(2,978)
Reclassification adjustments for net realized gains (losses)on available-for-sale securities included in net income, net of tax	100	(43)	(152)	(1,141)
Other comprehensive income (loss)	5,383	(35)	4,884	(4,119)
Total comprehensive income	$ 178,350	$ 118,699	$ 442,343	$ 288,954