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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.

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- Definition

The estimated measure of the 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.

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- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

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- Definition

Weighted average expected volatility rate of share-based compensation awards.

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- Definition

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

+ 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
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

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-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

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- Definition

Number of share instruments newly issued under a share-based compensation plan.

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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.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
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-Name Accounting Standards Codification
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-Section S99
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-URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809

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Share-Based Compensation Plans - Fair value of stock option grants (Details) - shares	12 Months Ended
	Feb. 28, 2019	Feb. 28, 2018	Feb. 28, 2017	Feb. 29, 2016
Assumptions used for fair value of stock options granted
Range of risk free interest rates used (as a percent)			1.20%
Expected dividend rate (as a percent)			0.00%
Weighted average volatility rate (as a percent)			33.40%
Range of expected volatility rates used (as a percent)			33.40%
Range of expected terms used (in years)			4 years 1 month 6 days
Stock options
Assumptions used for fair value of stock options granted
Options outstanding	163,000	300,000	448,000	649,000
The 2018 Plan
Assumptions used for fair value of stock options granted
Shares issued under 2008 Directors' Plan (in shares)	2,128
Directors \| The 2018 Plan \| Restricted Stock Units (RSU)
Assumptions used for fair value of stock options granted
Shares issued under 2008 Directors' Plan (in shares)	2,128	0	0
Certain Officers And Employees \| Employee Stock Option And Restricted Stock Plan1998 \| Stock options
Assumptions used for fair value of stock options granted
Options outstanding	0