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Fair Value - Summary of Assets and Liabilities Measured at Estimated Fair Value on Recurring basis (Details) - Recurring Basis - USD ($)
$ in Thousands
Feb. 28, 2017
Nov. 30, 2016
Assets    
Derivative financial instruments $ 1,567 $ 897
Total assets 1,567 897
Level 2    
Assets    
Derivative financial instruments 1,567 897
Total assets $ 1,567 $ 897