SHARE-BASED COMPENSATION PLANS (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended							12 Months Ended					0 Months Ended				12 Months Ended			1 Months Ended						12 Months Ended			0 Months Ended	12 Months Ended	0 Months Ended			12 Months Ended
	Feb. 28, 2013 plan	Feb. 29, 2012	Feb. 28, 2011	Feb. 28, 2013 Stock options	Feb. 29, 2012 Stock options	Feb. 28, 2011 Stock options	Feb. 28, 2010 Stock options	Feb. 28, 2013 Restricted Stock Award	Feb. 28, 2013 Restricted Stock Award Board members	Feb. 29, 2012 Restricted Stock Award Board members	Feb. 28, 2011 Restricted Stock Award Board members	Feb. 28, 2013 Restricted stock awards and units Performance based	Jun. 05, 2005 1995 Directors' Plan	Jun. 06, 2005 1995 Directors' Plan	Feb. 28, 2013 1995 Directors' Plan Stock options	Aug. 24, 2008 1998 Plan	Feb. 28, 2013 1998 Plan Stock options	Feb. 28, 2013 1998 Plan Stock options Minimum	Feb. 28, 2013 1998 Plan Stock options Maximum	Oct. 31, 2011 2008 Stock Incentive Plan	Sep. 30, 2011 2008 Stock Incentive Plan	Feb. 28, 2013 2008 Stock Incentive Plan	Oct. 11, 2011 2008 Stock Incentive Plan	Oct. 10, 2011 2008 Stock Incentive Plan	Feb. 28, 2013 2008 Stock Incentive Plan Stock options	Feb. 28, 2013 2008 Stock Incentive Plan Stock options Minimum	Feb. 28, 2013 2008 Stock Incentive Plan Stock options Maximum	Feb. 28, 2013 2008 Stock Incentive Plan Restricted Stock Award	Feb. 28, 2013 2008 Stock Incentive Plan Restricted Stock Award Chief Executive Officer and President	Feb. 28, 2013 2008 Stock Incentive Plan RSUs	Feb. 28, 2013 2008 Stock Incentive Plan RSUs Performance based Chief Executive Officer and President	Mar. 02, 2012 2008 Stock Incentive Plan RSUs Performance based Chief Executive Officer and President	Feb. 28, 2013 2008 Directors Plan	Feb. 28, 2013 2008 Directors Plan Restricted Stock Award	Feb. 29, 2012 2008 Directors Plan Restricted Stock Award	Feb. 28, 2011 2008 Directors Plan Restricted Stock Award	Feb. 28, 2013 2008 Stock Purchase Plan	Feb. 29, 2012 2008 Stock Purchase Plan	Feb. 28, 2011 2008 Stock Purchase Plan
SHARE-BASED COMPENSATION PLANS
Number of expired share-based compensation plans	2
Number of active share-based compensation plans	3
Share-based compensation plans
Number of shares of common stock covered for issuance under share based compensation plan														980,000		6,750,000							3,750,000	750,000									175,000				350,000
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 on either the first day of each option period or the last day of each period																																					85.00%
Shares of common stock acquired by plan participants																																					39,728	41,868	24,601
Price of common stock acquired by plan participants (in dollars per share)																																					$ 26.68	$ 24.17	$ 19.45
Vesting period													1 year				4 years	1 year	5 years							4 years	5 years
Term of award													10 years					7 years	10 years							7 years	10 years
Options outstanding				864,000	871,000	2,510,000	2,899,000								28,000		119,849								716,193
Maximum number of shares with respect to which awards of any and all types may be granted during a calendar year to any participant																				1,000,000	250,000
Restricted stock disclosure
Number of awards granted (in shares)								160,000																				700,000	159,666	700,000	700,000	700,000		10,512	18,000	11,600
Fair values at the date of grant of awards granted (in dollars per share)								$ 35.55																					$ 35.55	$ 32.88		$ 32.88		$ 31.54	$ 29.48	$ 22.26
Number of shares available for future issue under the plan																						2,244,643											126,888				199,541
Cumulative number of shares granted under the plan																																		48,112
SHARE-BASED PAYMENT EXPENSE
Share-based payment expense	$ 6,055	$ 2,928	$ 2,017	$ 2,298	$ 2,061	$ 1,603			$ 473	$ 531	$ 258	$ 2,988																									$ 296	$ 336	$ 156
Less income tax benefits	(858)	(99)	(99)
Share-based payment expense, net of income tax benefits	$ 5,197	$ 2,829	$ 1,918
Earnings per share impact of share based payment expense:
Basic (in dollars per share)	$ 0.16	$ 0.09	$ 0.06
Diluted (in dollars per share)	$ 0.16	$ 0.09	$ 0.06