Maximum value of common stock participants have rights to purchase.

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- Definition

Number Of Share-Based Compensation Plans

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- Definition

Share based compensation arrangement by share based payment award equity instruments options and other than options outstanding weighted average remaining contractual terms.

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- Definition

Share based compensation arrangement by share based payment award options and other than options exercisable intrinsic value1.

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- Definition

Share based compensation arrangement by share based payment award options and other than options outstanding intrinsic value.

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- Definition

Share based compensation arrangement by share based payment award options other than options exercisable weighted average remaining contractual term one.

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No definition available.

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- Definition

Share based compensation.

+ References

No definition available.

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- Definition

Aggregate number of common shares reserved for future issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.29)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Unrecognized cost of unvested share-based compensation awards.

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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Amount of cash inflow from realized tax benefit related to deductible compensation cost reported on the entity's tax return for equity instruments in excess of the compensation cost for those instruments recognized for financial reporting purposes.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 20
-Section 55
-Paragraph 24
-URI http://asc.fasb.org/extlink&oid=65896087&loc=d3e11374-113907

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- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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- Definition

The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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- Definition

Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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- Definition

The highest quantity of shares an employee can purchase under the plan per period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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- Definition

Gross number of share options (or share units) granted during the period.

+ References

No definition available.

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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.

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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

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- Definition

Purchase price of common stock expressed as a percentage of its fair value.

+ References

No definition available.

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Stock Compensation (Details Textual)	12 Months Ended
Stock Compensation (Details Textual)	Feb. 28, 2017 USD ($) share_based_compensation_plan $ / shares shares	Feb. 29, 2016 USD ($) $ / shares shares	Feb. 28, 2015 USD ($) $ / shares shares	Feb. 29, 2012 shares
Share Based Compensation (Textual) [Abstract]
Number of share-based compensation plans \| share_based_compensation_plan	1
Shares authorized (shares) \| shares	1,500,000
Share for future issuance (shares) \| shares	1,270,511
Unrecognized compensation cost	$ 6,764,700
Unrecongized compensation cost, amortization period	1 year 10 months 28 days
Tax benefits from stock options exercised	$ 0	$ 1,025,000	$ 259,000
Employee Stock Purchase Plan [Member]
Share Based Compensation (Textual) [Abstract]
Granted option lower than	85.00%
Restricted common stock under plan	$ 25,000
Common stock purchased during period (shares) \| shares	5,000
Directors Grants [Member]
Share Based Compensation (Textual) [Abstract]
Shares of company common stock (shares) \| shares	1,641	1,915	2,000	1,000
Value of common stock grants (usd per share) \| $ / shares	$ 60.94	$ 52.21	$ 44.90
Restricted Stock Units (RSUs) [Member]
Share Based Compensation (Textual) [Abstract]
Vesting ratably term	3 years
Total fair value of vested shares	$ 1,618,996	$ 897,712	$ 818,519
Non-vested shares outstanding (shares) \| shares	134,547	98,693	77,446
Non-vested shares outstanding, weighted average grant date fair value (usd per share) \| $ / shares	$ 51.100	$ 45.030	$ 41.310
Stock Appreciation Rights (SARs) [Member]
Share Based Compensation (Textual) [Abstract]
Vesting ratably term	3 years
Term for the contract	7 years
Outstanding average contractual term	3 years 6 months 7 days
Outstanding aggregate intrinsic value	$ 2,800,000
Average remaining contractual term	3 years 4 months 17 days
Aggregate remaining intrinsic value	$ 2,200,000