Income Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	9 Months Ended
Nov. 29, 2014	Nov. 30, 2013	Nov. 29, 2014	Nov. 30, 2013
Numerator for income per share:
Net income	$ 104,846us-gaap_NetIncomeLoss	$ 71,548us-gaap_NetIncomeLoss	$ 274,141us-gaap_NetIncomeLoss	$ 194,037us-gaap_NetIncomeLoss
Accretion of redeemable preferred stock		(26)		(77)
Cumulative preferred stock dividends		(2,814)		(8,318)
Conversion of Series G and H preferred stock		(25,603)		(25,603)
Income attributable to common stockholders-basic	104,846	43,105	274,141	160,039
Add back-interest on convertible notes	1,364		4,092
Income attributable to common stockholders-diluted	$ 106,210	$ 43,105	$ 278,233	$ 160,039
Denominator:
Basic weighted average shares	972,688	938,994	968,897	911,608
Outstanding options and restricted shares, net (in shares)	22,793	48,843	25,330	41,227
Convertible notes	24,796		24,796
Diluted weighted average shares	1,020,277	987,837	1,019,023	952,835
Basic income per share (in dollars per share)	$ 0.11us-gaap_EarningsPerShareBasic	$ 0.05us-gaap_EarningsPerShareBasic	$ 0.28us-gaap_EarningsPerShareBasic	$ 0.18us-gaap_EarningsPerShareBasic
Diluted income per share (in dollars per share)	$ 0.10us-gaap_EarningsPerShareDiluted	$ 0.04us-gaap_EarningsPerShareDiluted	$ 0.27us-gaap_EarningsPerShareDiluted	$ 0.17us-gaap_EarningsPerShareDiluted
Antidilutive securities excluded from computation of earnings per share
Potential common shares excluded from the computation of diluted income per share	4,593	48,364	3,251	57,233
Stock options
Antidilutive securities excluded from computation of earnings per share
Potential common shares excluded from the computation of diluted income per share	4,593	23,564	3,251	32,433
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		24,800

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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