Condensed Consolidated Statements Of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Nov. 01, 2014	Nov. 02, 2013	Nov. 01, 2014	Nov. 02, 2013
Statement of Comprehensive Income [Abstract]
Net earnings	$ 192,720	$ 171,618	$ 676,194	$ 619,351
Other comprehensive (loss) income:
Unrealized loss on investments, net of tax	(18)	(3)	(65)	(149)
Comprehensive income	$ 192,702	$ 171,615	$ 676,129	$ 619,202