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Restructuring Charges (Narrative) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
May 31, 2018 | May 31, 2017 | Feb. 28, 2017 | May 31, 2018 | May 31, 2017
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring expense | $ 426 | $ 662 |  | $ 2,247 | $ 17,801
Other accrued liabilities |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Short-term portion of restructuring reserve | 1,000 |  |  | 1,000 |
Other Noncurrent Liabilities |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Long-term portion of restructuring reserve | $ 200 |  |  | $ 200 |
2017 Restructuring Activities |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Global workforce reduction (as a percent) (over) |  |  | 20.00% |  |

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