Information about Stock Options Outstanding and Exercisable (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	6 Months Ended
	Aug. 02, 2014	Feb. 01, 2014
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options Outstanding, Number of Shares	5,790	5,668
Options Outstanding, Weighted-Average Remaining Contractual Life	6 years 8 months 12 days
Options Outstanding, Weighted-Average Exercise Price	$ 25.67	$ 22.66
Options Exercisable, Number of Shares	3,950
Options Exercisable, Weighted-Average Exercise Price	$ 19.87
$9.85 to $15.10
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Lower Limit	$ 9.85
Range of Exercise Prices, Upper Limit	$ 15.10
Options Outstanding, Number of Shares	1,520
Options Outstanding, Weighted-Average Remaining Contractual Life	5 years 1 month 17 days
Options Outstanding, Weighted-Average Exercise Price	$ 12.46
Options Exercisable, Number of Shares	1,520
Options Exercisable, Weighted-Average Exercise Price	$ 12.46
$18.80 to $23.92
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Lower Limit	$ 18.80
Range of Exercise Prices, Upper Limit	$ 23.92
Options Outstanding, Number of Shares	1,454
Options Outstanding, Weighted-Average Remaining Contractual Life	5 years 4 months 17 days
Options Outstanding, Weighted-Average Exercise Price	$ 19.95
Options Exercisable, Number of Shares	1,450
Options Exercisable, Weighted-Average Exercise Price	$ 19.95
$24.04 to $34.24
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Lower Limit	$ 24.04
Range of Exercise Prices, Upper Limit	$ 34.24
Options Outstanding, Number of Shares	2,029
Options Outstanding, Weighted-Average Remaining Contractual Life	7 years 8 months 19 days
Options Outstanding, Weighted-Average Exercise Price	$ 32.29
Options Exercisable, Number of Shares	962
Options Exercisable, Weighted-Average Exercise Price	$ 31.09
$34.27 to $50.71
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, Lower Limit	$ 34.27
Range of Exercise Prices, Upper Limit	$ 50.71
Options Outstanding, Number of Shares	787
Options Outstanding, Weighted-Average Remaining Contractual Life	9 years 6 months 22 days
Options Outstanding, Weighted-Average Exercise Price	$ 44.64
Options Exercisable, Number of Shares	18
Options Exercisable, Weighted-Average Exercise Price	$ 38.31