Represents the number of active share-based compensation plans of the entity.

No definition available.

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Less cumulative stock option grants issued under the plan

+ References

No definition available.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested and settled during the reporting period.

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No definition available.

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Represents the Sharebased compensation arrangement by sharebased payment award estimated maximum RSU upon potentially issuable upon vesting

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Represents the sharebased compensation arrangement by sharebased payment award maximum RSU potentially issuable upon vesting

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No definition available.

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Represents the number of shares authorized less cumulative stock options grants issued and restricted share awards previously vested and settled.

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No definition available.

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Period over which the entity measures performance in relation to targets, in order to determine shares or units to be awarded to plan participants.

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No definition available.

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Represents the effect of share-based compensation expenses on the basic earnings per share during the reporting period.

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No definition available.

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Represents the effect of share-based compensation expenses on the diluted earnings per share during the reporting period.

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No definition available.

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- Definition

Represents the threshold, target and maximum payouts which will vest and settle in shares based upon the fair value of the stock .

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No definition available.

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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.

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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.

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The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period.

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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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Percentage of vesting of share-based compensation awards.

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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).

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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).

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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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.

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- Definition

The highest percentage of annual salary that an employee is permitted to utilize with respect to the plan.

+ References

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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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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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

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The weighted average of per share prices paid for shares purchased on the open market for issuance to employees under the plan.

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

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No definition available.

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Number of shares of stock issued as of the balance sheet date, including shares that had been issued and were previously outstanding but which are now held in the treasury.

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Number of shares issued during the period as a result of an employee stock purchase plan.

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SHARE-BASED COMPENSATION PLANS - Plans and share-based payment expense (Details) (USD $)	12 Months Ended			0 Months Ended		1 Months Ended		0 Months Ended
	Feb. 28, 2015 item	Feb. 28, 2014	Feb. 28, 2013	Aug. 24, 2008	Feb. 28, 2014	Apr. 30, 2014	Apr. 30, 2013	Apr. 22, 2014	Apr. 22, 2013	Feb. 29, 2012
Share-based compensation plans
Number of active share-based compensation plans	3
SHARE-BASED PAYMENT EXPENSE
Less income tax benefits	$ (661,000)	$ (5,709,000)	$ (858,000)
Share-based payment expense, net of income tax benefits	5,557,000	26,160,000	5,197,000
Earnings per share impact of share-based payment expense:
Basic (in dollars per share)	$ 0.19	$ 0.82	$ 0.16
Diluted (in dollars per share)	$ 0.19	$ 0.81	$ 0.16
1998 Plan
Share-based compensation plans
Number of shares of common stock covered for issuance under share-based compensation plan				6,750,000
Restricted stock disclosure
Shares originally authorized				6,750,000
2008 Stock Incentive Plan
Share-based compensation plans
Number of shares of common stock covered for issuance under share-based compensation plan	3,750,000
Restricted stock disclosure
Shares originally authorized	3,750,000
Less cumulative stock option grants issued, net of forfeitures	(1,154,860)
Less restricted share awards previously vested and settled	(421,970)
Subtotal	2,173,170
Less maximum RSU's issuable upon vesting	(28,937)
Less estimated maximum PSU's issuable upon vesting	(178,101)
Shares available for issuance	1,966,132
Number of shares available for future issue under the plan	1,966,132
2008 Directors Plan
Share-based compensation plans
Number of shares of common stock covered for issuance under share-based compensation plan	175,000
Restricted stock disclosure
Shares originally authorized	175,000
Shares available for issuance	107,109
Number of shares available for future issue under the plan	107,109
2008 Stock Purchase Plan
Share-based compensation plans
Number of shares of common stock covered for issuance under share-based compensation plan	350,000
Restricted stock disclosure
Shares originally authorized	350,000
Shares available for issuance	127,085
Maximum withholding percentage of employee wages or salaries for the purchase of shares of common stock	15.00%
Purchase price for shares acquired under the plan as a percentage of the share's fair market value	85.00%
Shares of common stock acquired by plan participants	31,128	41,328	39,728
Price of common stock acquired by plan participants (in dollars per share)	$ 49.49	$ 32.66	$ 26.68		$ 32.66
Number of shares available for future issue under the plan	127,085
SG&A
SHARE-BASED PAYMENT EXPENSE
Share-based payment expense	6,218,000	31,869,000	6,055,000
SG&A \| 2008 Stock Purchase Plan
SHARE-BASED PAYMENT EXPENSE
Share-based payment expense	391,000	424,000	296,000
Stock Option Officers Employees and Consultants [Member]
Share-based compensation plans
Options outstanding	768,000	839,000	864,000		839,000					871,000
Stock Option Officers Employees and Consultants [Member] \| 2008 Stock Incentive Plan
Share-based compensation plans
Options outstanding	751,665
Stock Option Officers Employees and Consultants [Member] \| SG&A
SHARE-BASED PAYMENT EXPENSE
Share-based payment expense	3,279,000	2,380,000	2,298,000
Stock Option Officers Employees and Consultants [Member] \| Minimum \| 2008 Stock Incentive Plan
Share-based compensation plans
Vesting period	4 years
Term of award	7 years
Restricted stock disclosure
Vesting period	4 years
Stock Option Officers Employees and Consultants [Member] \| Maximum \| 2008 Stock Incentive Plan
Share-based compensation plans
Vesting period	5 years
Term of award	10 years
Restricted stock disclosure
Vesting period	5 years
Stock Option Officers Employees and Consultants [Member] \| Certain officers and employees \| 1998 Plan
Share-based compensation plans
Options outstanding	16,350
Stock Option Officers Employees and Consultants [Member] \| Certain officers and employees \| Minimum \| 1998 Plan
Share-based compensation plans
Vesting period				4 years
Term of award				7 years
Restricted stock disclosure
Vesting period				4 years
Stock Option Officers Employees and Consultants [Member] \| Certain officers and employees \| Maximum \| 1998 Plan
Share-based compensation plans
Vesting period				5 years
Term of award				10 years
Restricted stock disclosure
Vesting period				5 years
Restricted stock (RSA)
Restricted stock disclosure
Number of awards vested (in shares)					159,666	62,304
Vested in period, fair value at award date (in dollars per share)					$ 35.55	$ 67.10
Restricted stock (RSA) \| 2008 Stock Incentive Plan
Restricted stock disclosure
Number of awards vested (in shares)	62,000	160,000
Vested in period, fair value at award date (in dollars per share)	$ 67.10	$ 35.55
Number of awards granted (in shares)		62,000	160,000
Grant date fair value (in dollars per share)		$ 67.10	$ 35.55
Restricted stock (RSA) \| 2008 Directors Plan
Restricted stock disclosure
Number of awards granted (in shares)	9,267	10,512	10,512
Grant date fair value (in dollars per share)	$ 61.72	$ 41.26	$ 31.54
Shares, Issued	67,891
Restricted stock (RSA) \| Former CEO \| 2008 Stock Incentive Plan
Restricted stock disclosure
Number of awards vested (in shares)	62,304				159,666
Vested in period, fair value at award date (in dollars per share)	$ 67.10				$ 35.55
Restricted Stock Units (RSU)
Restricted stock disclosure
Number of awards vested (in shares)	100,000	100,000
Vested in period, fair value at award date (in dollars per share)	$ 32.88	$ 32.88
Number of awards granted (in shares)	118,000		700,000
Grant date fair value (in dollars per share)	$ 58.35		$ 32.88
Restricted Stock Units (RSU) \| 2008 Stock Incentive Plan
Restricted stock disclosure
Number of awards granted (in shares)	28,937
Grant date fair value (in dollars per share)	$ 58.36
Maximum payout	1,690,000
Restricted Stock Units (RSU) \| Vesting period one \| 2008 Stock Incentive Plan
Restricted stock disclosure
Awards currently outstanding vesting percentage	50.00%
Restricted Stock Units (RSU) \| Vesting period two \| 2008 Stock Incentive Plan
Restricted stock disclosure
Awards currently outstanding vesting percentage	50.00%
Performance Restricted Stock Units (PSU)
Restricted stock disclosure
Number of awards vested (in shares)						166,600	34,400
Performance Restricted Stock Units (PSU) \| 2008 Stock Incentive Plan
Restricted stock disclosure
Number of awards vested (in shares)					66,600			100,000	33,400
Vested in period, fair value at award date (in dollars per share)								$ 67.10	$ 35.55
Number of awards granted (in shares)	178,101
Grant date fair value (in dollars per share)	$ 58.34				$ 65.31
Performance period (in years)	3 years
Maximum payout	10,390,000
Performance Restricted Stock Units (PSU) \| Former CEO \| 2008 Stock Incentive Plan \| Separation Agreement
Restricted stock disclosure
Number of awards granted (in shares)		100,000	100,000
Grant date fair value (in dollars per share)		$ 32.88	$ 32.88
Performance-based and other stock awards \| SG&A
SHARE-BASED PAYMENT EXPENSE
Share-based payment expense	1,732,000	13,446,000	2,988,000
Stock compensation \| Directors \| SG&A
SHARE-BASED PAYMENT EXPENSE
Share-based payment expense	816,000	619,000	473,000
Stock compensation \| Former CEO \| SG&A \| Separation Agreement
SHARE-BASED PAYMENT EXPENSE
Share-based payment expense		$ 15,000,000