Options Granted under Stock Option Plans (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Feb. 02, 2013	Jan. 28, 2012	Jan. 29, 2011
Number of Shares
Options outstanding at beginning of year	7,227	7,220	7,002
Granted	940	1,612	1,311
Exercised	(2,213)	(1,454)	(942)
Expired or cancelled	(47)	(151)	(151)
Options outstanding at end of year	5,907	7,227	7,220
Options exercisable at end of year	3,593	4,598	5,088
Options available for future grant at end of year	5,518	7,155	10,339
Weighted-Average Exercise Price
Options outstanding at beginning of year	$ 18.44	$ 17.17	$ 16.88
Granted	$ 30.96	$ 19.13	$ 15.10
Exercised	$ 19.67	$ 13.02	$ 11.65
Expired or cancelled	$ 23.74	$ 17.38	$ 20.41
Options outstanding at end of year	$ 19.93	$ 18.44	$ 17.17
Options exercisable at end of year	$ 17.83	$ 19.35	$ 18.81