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Income Taxes (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
May 31, 2018
Feb. 28, 2018
May 31, 2017
May 31, 2018
May 31, 2017
Income Tax Disclosure [Abstract]          
Effective income tax rate (as a percent) 25.00%   45.00% 23.00% 47.00%
Error Corrections and Prior Period Adjustments Restatement [Line Items]          
Provisional tax benefit $ (5,101)   $ (8,391) $ (8,372) $ (8,791)
Adjustment for Error Correction          
Error Corrections and Prior Period Adjustments Restatement [Line Items]          
Provisional tax benefit   $ 1,400