Stock Plans - Additional Information (Detail) (USD $)	12 Months Ended					12 Months Ended
	Mar. 03, 2012	Feb. 26, 2011	Feb. 27, 2010	Jul. 31, 2009 Stock Incentive Plan 2009	Jul. 31, 2009 Stock Incentive Plan 2009 All awards other than options and stock appreciation rights	Mar. 03, 2012 Stock Options Year	Feb. 26, 2011 Stock Options	Feb. 27, 2010 Stock Options	Mar. 03, 2012 Restricted stock awards Year	Feb. 26, 2011 Restricted stock awards	Feb. 27, 2010 Restricted stock awards	Mar. 03, 2012 Restricted stock awards Employees	Mar. 03, 2012 Restricted stock awards Employees Cliff-vesting	Mar. 03, 2012 Restricted stock awards Non-employee Directors Cliff-vesting	Mar. 03, 2012 Employee Stock Purchase Plan	Feb. 26, 2011 Employee Stock Purchase Plan	Feb. 27, 2010 Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized				6,500,000	2,500,000										2,400,000
Share-based compensation	$ 5,187,000	$ 4,209,000	$ 3,508,000			$ 2,112,000	$ 1,772,000	$ 1,268,000	$ 2,986,000	$ 2,372,000	$ 2,174,000				$ 89,000	$ 65,000	$ 66,000
Estimated weighted-average fair value of individual options granted	$ 8.98	$ 6.00	$ 2.49
Options vesting period	4 years
Options expiration term	10 years
Total unrecognized compensation cost						4,762,000			4,131,000
Total unrecognized compensation cost, weighted average recognition period						1.8			1.9
Total intrinsic value of options exercised	14,698,000	4,155,000	1,585,000
Share-based compensation vesting period												3 years	3 years	1 year
Performance-based awards performance period												3 years
Total fair value of awards vested									$ 2,511,000
Employee Stock Purchase Plan, maximum percentage of annual compensation to acquire common stock	10.00%
Employee Stock Purchase Plan, percentage of market price to acquire common stock	85.00%
Employee Stock Purchase Plan, shares purchased	27,000	28,000	53,000
Employee Stock Purchase Plan, percentage of discount on compensation expense	15.00%