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BORROWINGS: Future Minimum Payments, Interest Expense (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Aug. 31, 2016
Aug. 31, 2015
Aug. 31, 2016
Aug. 31, 2015
Nov. 30, 2015
Long-term Debt, Fiscal Year Maturity [Abstract]          
Fiscal year 2016 (remaining three months) $ 160,274   $ 160,274    
Fiscal Year 2017 39,336   39,336    
Fiscal Year 2018 108,805   108,805    
Fiscal Year 2019 62,507   62,507    
Fiscal Year 2020 437,500   437,500    
Total borrowings 808,422   808,422   $ 730,891
Interest Expense, Debt [Abstract]          
Interest expense and finance charge $ 8,178 $ 7,152 $ 22,022 $ 20,302  
Minimum [Member]          
Interest Expense, Debt [Abstract]          
Variable interest percentage 0.73% 0.60% 0.73% 0.57%  
Maximum [Member]          
Interest Expense, Debt [Abstract]          
Variable interest percentage 4.00% 4.25% 4.00% 4.50%