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Restructuring Charges (Narrative) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
May 31, 2019 | May 31, 2018 | [1] | May 31, 2019 | May 31, 2018 | [1] | Nov. 30, 2017 | Nov. 30, 2018
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring expenses | $ 2,777 | $ 426 | $ 3,192 | $ 2,247 |  |
Restructuring reserve | 2,651 |  | 2,651 |  |  | $ 311
2019 Restructuring Activities |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring expenses |  |  | 2,702 |  |  |
Restructuring reserve |  |  |  |  |  | 0
2019 Restructuring Activities | Other accrued liabilities |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring reserve | 2,258 |  | 2,258 |  |  |
2017 Restructuring Activities |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring expenses | 100 |  | 490 |  |  |
Restructuring reserve |  |  |  |  |  | $ 311
Global workforce reduction (as a percent) (over) |  |  |  |  | 20.00% |
2017 Restructuring Activities | Other accrued liabilities |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring reserve | $ 393 |  | $ 393 |  |  |
[1] | The Company adopted ASC 606 effective December 1, 2018 using the full retrospective method. See Note 1. Nature of Business and Basis of Presentation for further information.

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