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Stock-based Compensation (Details 1) - Stock Appreciation Rights (SARs) [Member] - $ / shares
6 Months Ended
Aug. 31, 2017
Feb. 28, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 163,515 170,139
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price $ 41.96 $ 42.02
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments, Number of Shares [Roll Forward]    
Granted (shares) 0  
Exercised (shares) (4,479)  
Forfeited (shares) (2,145)  
Exercisable as of August 31, 2017 153,515  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instrument, Weighted Average Grant Date Fair Value [Roll Forward]    
Granted, Weighted Average Exercise Price (usd per share) $ 0.00  
Exercised, Weighted Average Exercise Price (usd per share) 42.54  
Forfeited, Weighted Average Exercise Price (usd per share) 45.36  
Exercisable as of August 31, 2017 $ 41.75