Options Granted under Stock Option Plans (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	9 Months Ended
	Nov. 02, 2013
Shares
Options outstanding at the beginning of the year	5,907
Granted	1,154
Exercised	(964)
Expired or cancelled	(59)
Options outstanding at end of period	6,038
Options exercise at end of period	3,857
Options available for future grant at end of period	3,336
Weighted-Average Term
Options outstanding at end of period	6 years 7 months 2 days
Options exercisable at end of period	5 years 4 months 24 days
Weighted-Average Exercise Price
Weighted Average Exercise Price at the beginning of the year	$ 19.93
Granted	$ 34.25
Exercised	$ 19.12
Expired or cancelled	$ 29.56
Weighted Average Exercise Price at end of year	$ 22.70
Weighted Average Exercise Price Exercisable at end of year	$ 18.51