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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 |  |  |

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