Options Granted under Stock Option Plans (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Jan. 28, 2012	Jan. 29, 2011	Jan. 30, 2010
Number of Shares
Options outstanding at beginning of year	7,220	7,002	6,080
Granted	1,612	1,311	1,521
Exercised	(1,454)	(942)	(181)
Expired or cancelled	(151)	(151)	(418)
Options outstanding at end of year	7,227	7,220	7,002
Options exercisable at end of year	4,598	5,088	5,084
Options available for future grant at end of year	7,155	10,339	2,214
Weighted-Average Exercise Price
Options outstanding at beginning of year	$ 17.17	$ 16.88	$ 18.64
Granted	$ 19.13	$ 15.10	$ 10.02
Exercised	$ 13.02	$ 11.65	$ 8.76
Expired or cancelled	$ 17.38	$ 20.41	$ 21.03
Options outstanding at end of year	$ 18.44	$ 17.17	$ 16.88
Options exercisable at end of year	$ 19.35	$ 18.81	$ 18.85