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Fair Value (Details) - USD ($)
$ in Thousands
Feb. 28, 2018
Nov. 30, 2017
Financial assets and liabilities carried at fair value and measured at fair value on a recurring basis:    
Assets, transfers from Level 1 to Level 2 $ 0  
Liabilities, transfers from Level 1 to Level 2 0  
Assets, transfers from Level 2 to Level 1 0  
Liabilities, transfers from Level 2 to Level 1 0  
Interest rate swaps 239 $ 845
Recurring basis | Level 2    
Financial assets and liabilities carried at fair value and measured at fair value on a recurring basis:    
Interest rate swaps 2,726 644
Interest rate swaps $ 239 $ 845