Income Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	May 31, 2014	Jun. 01, 2013
Numerator for income per share:
Net income	$ 41,446	$ 89,662
Accretion of redeemable preferred stock		(25)
Cumulative preferred stock dividends		(2,732)
Income attributable to common stockholders-basic	41,446	86,905
Add back-interest on convertible notes		1,364
Add back-cumulative preferred stock dividends		2,732
Income attributable to common stockholders-diluted	$ 41,446	$ 91,001
Denominator:
Basic weighted average shares	963,332	893,871
Outstanding options and restricted shares, net (in shares)	33,222	38,812
Convertible notes (in shares)		24,800
Convertible preferred stock (in shares)		33,605
Diluted weighted average shares	996,554	991,088
Basic income per share (in dollars per share)	$ 0.04	$ 0.10
Diluted income per share (in dollars per share)	$ 0.04	$ 0.09
Antidilutive securities excluded from computation of earnings per share
Potential common shares excluded from the computation of diluted income per share	24,800	49,324
Stock options
Antidilutive securities excluded from computation of earnings per share
Potential common shares excluded from the computation of diluted income per share		49,324
Convertible notes
Antidilutive securities excluded from computation of earnings per share
Potential common shares excluded from the computation of diluted income per share	24,800