Condensed Consolidated Statements Of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Aug. 03, 2013	Jul. 28, 2012	Aug. 03, 2013	Jul. 28, 2012
Statement of Comprehensive Income [Abstract]
Net earnings	$ 213,121	$ 182,024	$ 447,733	$ 390,637
Other comprehensive income:
Change in unrealized (loss) gain on investments, net of tax	(147)	25	(146)	16
Comprehensive income	$ 212,974	$ 182,049	$ 447,587	$ 390,653