Outstanding and Exercisable Options (Detail) (USD $)	12 Months Ended
	Mar. 01, 2014	Mar. 02, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number Outstanding	1,916,596	2,196,177
Weighted-Average Remaining Contractual Life	7 years 2 months 12 days
Weighted-Average Exercise Price	$ 17.14	$ 14.54
Number Exercisable	590,017
Weighted-Average Exercise Price	$ 12.08
$1-$10 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices, Lower Limit	$ 1
Range of Exercise Prices, Upper Limit	$ 10
Number Outstanding	233,202
Weighted-Average Remaining Contractual Life	4 years 7 months 6 days
Weighted-Average Exercise Price	$ 5.75
Number Exercisable	233,202
Weighted-Average Exercise Price	$ 5.75
$10-$15 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices, Lower Limit	$ 10
Range of Exercise Prices, Upper Limit	$ 15
Number Outstanding	288,048
Weighted-Average Remaining Contractual Life	4 years 10 months 24 days
Weighted-Average Exercise Price	$ 13.11
Number Exercisable	167,631
Weighted-Average Exercise Price	$ 13.09
$15-$20 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices, Lower Limit	$ 15
Range of Exercise Prices, Upper Limit	$ 20
Number Outstanding	848,186
Weighted-Average Remaining Contractual Life	8 years 0 months
Weighted-Average Exercise Price	$ 19.08
Number Exercisable	134,843
Weighted-Average Exercise Price	$ 18.15
$20-$30 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices, Lower Limit	$ 20
Range of Exercise Prices, Upper Limit	$ 30
Number Outstanding	547,160
Weighted-Average Remaining Contractual Life	8 years 2 months 12 days
Weighted-Average Exercise Price	$ 21.14
Number Exercisable	54,341
Weighted-Average Exercise Price	$ 21.05