CONDENSED CONSOLIDATED STATEMENT OF COMPREHNSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jul. 27, 2014	Jul. 28, 2013	Jul. 27, 2014	Jul. 28, 2013
Net income	$ 127,976	$ 96,448	$ 264,492	$ 174,339
Net change in unrealized gains (losses) on available-for-sale securities, net of tax	(1,931)	(3,377)	(247)	(2,986)
Reclassification adjustments for net realized gains on available-for-sale securities included in net income, net of tax	(55)	(1,019)	(252)	(1,098)
Other comprehensive loss, net of tax	(1,986)	(4,396)	(499)	(4,084)
Total comprehensive income	$ 125,990	$ 92,052	$ 263,993	$ 170,255