XML 41 R30.htm IDEA: XBRL DOCUMENT v3.8.0.1
Stock-based Compensation (Details 1) - Stock Appreciation Rights (SARs) [Member] - $ / shares
3 Months Ended
May 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 166,504 170,139
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) (1,490)  
Forfeited (shares) (2,145)  
Exercisable as of May 31, 2017 156,504  
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) 44.46  
Forfeited, Weighted Average Exercise Price (usd per share) 45.36  
Exercisable as of May 31, 2017 $ 41.74