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Derivative Instruments (Outstanding Foreign Currency Forward Contracts) (Details) - USD ($)
Nov. 30, 2019
Nov. 30, 2018
Derivative [Line Items]    
Derivative contracts, notional value $ 68,408,000 $ 106,070,000
Derivative contracts, fair value (80,000) (170,000)
Interest Rate Swap    
Derivative [Line Items]    
Derivative contracts, notional value 148,125,000 0
Derivative assets (liabilities), at fair value (2,054,000) 0
Derivative contracts, fair value (2,100,000)  
Forward contracts to sell U.S. dollars    
Derivative [Line Items]    
Derivative contracts, notional value 66,951,000 105,830,000
Derivative contracts, fair value (85,000) (170,000)
Forward contracts to purchase U.S. dollars    
Derivative [Line Items]    
Derivative contracts, notional value 1,457,000 240,000
Derivative contracts, fair value $ 5,000 $ 0