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STOCKHOLDERS' EQUITY (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Jun. 07, 2018
Feb. 28, 2019
Feb. 28, 2018
Feb. 28, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Issuance of common stock under ESPP 1,750,000      
Shares available for grant   1,705,685    
Unrecognized share-based compensation cost   $ 25.5    
Unrecognized compensation cost, recognition period   2 years 9 months 18 days    
Aggregate fair value of stock options exercised and vested restricted stock-based awards   $ 8.6 $ 6.9 $ 6.3
Excess tax deductions from equity awards   $ 2.9 $ 2.6 $ 0.0
Employee Stock Option [Member] | 2004 Incentive Stock Plan [Member] | Maximum [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Expiration term   10 years    
Vesting period   4 years