Condensed Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 30, 2016	Aug. 01, 2015	Jul. 30, 2016	Aug. 01, 2015
Statement of Comprehensive Income [Abstract]
Net earnings	$ 281,906	$ 258,639	$ 572,540	$ 540,844
Other comprehensive (loss) income:
Change in unrealized loss on investments, net of tax	(11)	(25)	(23)	(107)
Comprehensive income	$ 281,895	$ 258,614	$ 572,517	$ 540,737