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Share-Based Compensation Plans (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Nov. 30, 2016 | May 31, 2016 | Nov. 30, 2015 | Nov. 30, 2016 | Nov. 30, 2015
SHARE-BASED PAYMENT EXPENSE |  |  |  |  |
Less income tax benefits | $ (706) |  | $ (396) | $ (2,920) | $ (989)
Share-based payment expense, net of income tax benefits | $ 2,249 |  | $ 1,865 | $ 8,897 | $ 5,314
Earnings per share impact of share-based payment expense: |  |  |  |  |
Basic (in dollars per share) | $ 0.08 |  | $ 0.07 | $ 0.32 | $ 0.19
Diluted (in dollars per share) | $ 0.08 |  | $ 0.07 | $ 0.32 | $ 0.18
SG&A |  |  |  |  |
SHARE-BASED PAYMENT EXPENSE |  |  |  |  |
Share-based payment expense | $ 2,955 |  | $ 2,261 | $ 11,817 | $ 6,303
Certain officers and employees |  |  |  |  |
Share-based compensation plans |  |  |  |  |
Options granted (in shares) |  | 1,500 |  |  |
Employee stock options |  |  |  |  |
Share-based compensation plans |  |  |  |  |
Range of risk free interest rates used, minimum (as a percent) |  | 1.22% |  |  |
Expected dividend rate (as a percent) |  | 0.00% |  |  |
Range of expected volatility rates used, minimum (as a percent) |  | 33.40% |  |  |
Exercise of stock options (in shares) | 35,675 |  |  | 147,342 |
Employee stock options | Minimum |  |  |  |  |
Share-based compensation plans |  |  |  |  |
Fair value for grants (in dollars per share) |  | $ 28.74 |  |  |
Term of award |  | 4 years |  |  |
Expected terms used |  | 4 years 18 days |  |  |
Restricted stock (RSA) | Directors |  |  |  |  |
Share-based compensation plans |  |  |  |  |
Number of awards granted (in shares) | 1,358 |  |  | 3,829 |
Grant date fair value | $ 120 |  |  | $ 370 |
Grant date fair value (in dollars per share) | $ 90.31 |  |  | $ 96.27 |
Share-based compensation. | Directors | SG&A |  |  |  |  |
SHARE-BASED PAYMENT EXPENSE |  |  |  |  |
Share-based payment expense | $ 175 |  | 175 | $ 525 | 525
Performance-based and other stock awards | SG&A |  |  |  |  |
SHARE-BASED PAYMENT EXPENSE |  |  |  |  |
Share-based payment expense | $ 2,151 |  | 1,368 | 8,998 | 3,500
Employee stock purchase plan |  |  |  |  |
Share-based compensation plans |  |  |  |  |
Shares of common stock acquired by plan participants | 14,580 |  |  |  |
Purchase price of stock issued under employee stock purchase plan | $ 1,120 |  |  |  |
Employee stock purchase plan | SG&A |  |  |  |  |
SHARE-BASED PAYMENT EXPENSE |  |  |  |  |
Share-based payment expense |  |  |  | 258 | 223
Stock Option Officers Employees and Consultants | SG&A |  |  |  |  |
SHARE-BASED PAYMENT EXPENSE |  |  |  |  |
Share-based payment expense | $ 629 |  | $ 718 | $ 2,036 | $ 2,055
Restricted Stock Units (RSU) |  |  |  |  |
Share-based compensation plans |  |  |  |  |
Options granted (in shares) | 306 |  |  | 83,888 |
Fair value for grants (in dollars per share) | $ 88.18 |  |  | $ 97.60 |
Number of awards granted (in shares) |  | 2,265 |  | 15,496 |
Grant date fair value | $ 190 |  |  | $ 1,460 |
Grant date fair value (in dollars per share) | $ 85.97 |  |  | $ 94.47 |
Performance Restricted Stock Units (PSU) |  |  |  |  |
Share-based compensation plans |  |  |  |  |
Options granted (in shares) |  | 69,728 |  |  |
Fair value for grants (in dollars per share) |  | $ 97.12 |  |  |

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The amount of expense, net of income tax, recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References No definition available. + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The estimated measure of the minimum percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + References No definition available. + Details
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- Definition The minimum risk-free interest rate assumption that is used in valuing an option on its own shares. + 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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.D.2) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 + Details
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- Definition Value, before forfeitures, of stock or other type of equity granted of any equity-based compensation plan other than an employee stock ownership plan (ESOP). + References No definition available. + Details
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