Condensed Consolidated Statements Of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Aug. 02, 2014	Aug. 03, 2013	Aug. 02, 2014	Aug. 03, 2013
Statement of Comprehensive Income [Abstract]
Net earnings	$ 239,561	$ 213,121	$ 483,474	$ 447,733
Other comprehensive income:
Unrealized loss on investments, net of tax	(14)	(147)	(47)	(146)
Comprehensive income	$ 239,547	$ 212,974	$ 483,427	$ 447,587