Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 10

-Section 50

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

+ References

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-Publisher FASB

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Number of options outstanding, including both vested and non-vested options.

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-Name Accounting Standards Codification

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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Number of share options (or share units) exercised during the current period.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

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Stock-Based Compensation (Details) (USD $)	12 Months Ended
Stock-Based Compensation (Details) (USD $)	Feb. 28, 2015	Mar. 01, 2014	Mar. 02, 2013	Feb. 28, 2015
Award transactions on stock options
Outstanding shares awards exercised	(146,000)	(328,000)	(243,000)
Award transactions on stock options, Weighted Average Exercise Price
Weighted average exercise price, Beginning	$ 13.88
Weighted average exercise price, Awards exercised	$ 19.38
Weighted average exercise price, Awards canceled	$ 11.86
Weighted average exercise price, Ending	$ 11.92	$ 13.88
Weighted average exercise price, Exercisable				$ 11.92
Weighted average remaining contractual life, Outstanding	5 years 4 months 0 days
Weighted average remaining contractual life, Exercisable	5 years 4 months 0 days
Aggregate intrinsic value, Outstanding				$ 21,178,150
Aggregate intrinsic value, Exercisable				$ 21,178,150
Options/SARs Outstanding
Award transactions on stock options
Outstanding, Beginning	847,852
Outstanding shares awards exercised	(223,257)
Outstanding shares awards canceled	(500)
Outstanding, Ending	624,095
Outstanding shares exercisable				624,095