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Derivative Instruments (Narrative) (Details) - USD ($)
12 Months Ended
Nov. 30, 2019
Nov. 30, 2018
Nov. 30, 2017
Jul. 09, 2019
Derivative [Line Items]        
Derivative liabilities $ 80,000 $ 170,000    
Interest Rate Swap        
Derivative [Line Items]        
Notional amount       $ 150,000,000.0
Percentage of variable rate debt, managed variability 50.00%      
Fixed interest rate       1.855%
Derivative liabilities $ 2,100,000      
Forward Contracts        
Derivative [Line Items]        
Derivative liabilities $ 100,000      
Minimum maturity period, foreign currency derivative 30 days      
Maximum maturity period, foreign currency derivative 2 years      
Gains (losses) on foreign currency option contracts $ (1,100,000) (6,900,000) $ 9,400,000  
Other Accrued Liabilities        
Derivative [Line Items]        
Derivative liabilities   300,000    
Other Assets        
Derivative [Line Items]        
Derivative liabilities   $ 100,000    
London Interbank Offered Rate (LIBOR) | Interest Rate Swap        
Derivative [Line Items]        
Basis spread on variable rate       0.00%