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SHARE-BASED COMPENSATION PLANS (Details 2) (USD $)
In Thousands, except Share data, unless otherwise specified
 12 Months Ended
Feb. 29, 2012
Y
Feb. 28, 2011
Y
Feb. 28, 2010
Y
UNRECOGNIZED SHARE-BASED COMPENSATION EXPENSE      
Unrecognized Compensation Expense $ 4,385    
Weighted Average Period of Recognition (in months) 35.0    
Stock options
      
ASSUMPTIONS USED FOR FAIR VALUE OF STOCK OPTION GRANTS      
Range of risk free interest rates used, minimum (as a percent) 0.60% 1.20% 1.70%
Range of risk free interest rates used, maximum (as a percent) 1.50% 1.70% 2.00%
Expected dividend rate (as a percent) 0.00% 0.00% 0.00%
Weighted average volatility rate (as a percent) 52.50% 50.00% 50.60%
Range of expected volatility rates used, minimum (as a percent) 51.40% 49.40% 45.50%
Range of expected volatility rates used, maximum (as a percent) 65.90% 53.00% 55.50%
Range of expected terms used, minimum (in years) 4.1   4.1
Range of expected terms used, maximum (in years) 4.4   4.6
Range of expected terms used (in years)   3.4  
Options      
Outstanding at the beginning of the period (in shares) 2,510,000    
Grants (in shares) 379,000    
Exercises (in shares) (1,907,000)    
Forfeitures / expirations (in shares) (111,000)    
Outstanding at the end of the period (in shares) 871,000 2,510,000  
Exercisable      
Exercisable at the end of the period (in shares) 254,000    
Weighted Average Exercise price (per share)      
Outstanding at the beginning of the period (in dollars per share) $ 17.64    
Grants (in dollars per share) $ 32.71    
Exercises (in dollars per share) $ (16.10)    
Forfeitures / expirations (in dollars per share) $ (27.91)    
Outstanding at the end of the period (in dollars per share) $ 26.26 $ 17.64  
Exercisable at the end of the period (in dollars per share) $ 23.91    
Weighted Average Grant Date Fair Value (per share)      
Outstanding at the beginning of the period (in dollars per share) $ 6.40    
Grants (in dollars per share) $ 13.13    
Outstanding at the end of the period (in dollars per share) $ 10.31 $ 6.40  
Exercisable at the end of the period (in dollars per share) $ 8.66    
Weighted Average Remaining Contractual Term (in years)      
Outstanding at the beginning of the period (in years) 3.05    
Outstanding at the end of the period (in years) 5.78 3.05  
Exercisable at the end of the period (in years) 3.59    
Intrinsic Value      
Outstanding at the beginning of the period 26,054    
Exercises 36,912    
Outstanding at the end of the period 5,570 26,054  
Exercisable $ 2,190    
Non-Vested Options      
Outstanding at the beginning of the period (in shares) 496,000    
Grants (in shares) 379,000    
Vested or forfeited (in shares) (258,000)    
Outstanding at the end of the period (in shares) 617,000 496,000  
Weighted Average Grant Date Fair Value (per share)      
Outstanding at the beginning of the period (in dollars per share) $ 8.42    
Grants (in dollars per share) $ 13.13    
Vested or forfeited (in dollars per share) $ (9.19)    
Outstanding at the end of the period (in dollars per share) $ 10.99 $ 8.42