Condensed Consolidated Statements Of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
	May 03, 2014	May 04, 2013
Statement of Comprehensive Income [Abstract]
Net earnings	$ 243,913	$ 234,612
Other comprehensive income:
Change in unrealized (loss) gain on investments, net of tax	(33)	1
Comprehensive income	$ 243,880	$ 234,613