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Capital Structure Capital Structure (Details) - $ / shares
3 Months Ended 12 Months Ended
Feb. 28, 2017
Feb. 28, 2019
Feb. 28, 2018
Apr. 01, 2019
Jul. 01, 2006
May 01, 1999
Capital Unit [Line Items]            
Treasury stock, shares   2,168,094 2,168,094      
Stock Repurchase Program, Number of Shares Authorized to be Repurchased   1,383,271   3,000,000 2,000,000 1,563,000
Preferred Stock, Par or Stated Value Per Share   $ 0.01 $ 0.01      
Preferred Stock, Shares Authorized   1,500,000 1,500,000      
Preferred stock, shares outstanding   0 0      
Preferred Stock, Liquidation Preference Per Share   $ 0        
Stock Repurchased During Period, Shares 0 0 0      
Treasury Stock [Member]            
Capital Unit [Line Items]            
Treasury stock, shares   2,168,094 2,168,094      
Preferred Stock [Member]            
Capital Unit [Line Items]            
Preferred Stock, Par or Stated Value Per Share   $ 50.00        
Preferred Stock, Shares Authorized   50,000 50,000      
Preferred stock, shares outstanding   0 0      
Preferred Stock, Voting Rights   0        
Series A Preferred Stock [Member]            
Capital Unit [Line Items]            
Preferred Stock, Par or Stated Value Per Share   $ 0.01        
Preferred Stock, Shares Authorized   1,500,000 1,500,000      
Preferred stock, shares outstanding   0 0      
Preferred Stock, Voting Rights   0        
Common Class A [Member]            
Capital Unit [Line Items]            
Common Stock, Par or Stated Value Per Share   $ 0.01 $ 0.01      
Common Stock, Shares Authorized   60,000,000 60,000,000      
Common Stock, Shares, Outstanding   21,938,100 21,938,100      
Common Stock, Voting Rights   1        
Common Class B [Member]            
Capital Unit [Line Items]            
Common Stock, Par or Stated Value Per Share   $ 0.01 $ 0.01      
Common Stock, Shares Authorized   10,000,000 10,000,000      
Common Stock, Shares, Outstanding   2,260,954 2,260,954      
Common Stock, Voting Rights   10