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Share-Based Compensation Plans - Non-vested stock option activity (Details) - Stock options - $ / shares shares in Thousands | 12 Months Ended
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Feb. 28, 2019 | Feb. 28, 2018 | Feb. 28, 2017
Non-Vested Options |  |  |
Outstanding at the beginning of the period (in shares) | 125 | 280 | 521
Grants (in shares) | 0 | 0 | 2
Vested or forfeited (in shares) | (88) | (155) | (243)
Outstanding at the end of the period (in shares) | 37 | 125 | 280
Weighted Average Grant Date Fair Value (per share) |  |  |
Outstanding at the beginning of the period (in usd per share) | $ 19.31 | $ 22.48 | $ 20.81
Grants (in usd per share) | 0.00 | 0.00 | 28.74
Vested or forfeited (in usd per share) | 14.67 | 25.02 | 18.95
Outstanding at the end of the period (in usd per share) | $ 30.44 | $ 19.31 | $ 22.48

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- Definition Represents the combined number of options vested and non-vested options forfeited. + References No definition available. + Details
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- Definition Combined weighted average grant-date fair value of options vested and non-vested for options forfeited. + References No definition available. + Details
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- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Number of non-vested options outstanding. + References No definition available. + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Weighted average grant-date fair value of non-vested options outstanding. + References No definition available. + Details
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- References No definition available. + Details
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- Details
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