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Income Taxes (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Nov. 30, 2020 | Nov. 30, 2019 | Nov. 30, 2018 | Nov. 30, 2017
Operating Loss Carryforwards [Line Items] |  |  |  |
Income tax benefit due to the re-measurement of its net U.S. deferred tax liabilities due to the Act |  |  | $ 1,700 |
Increase (decrease) in valuation allowance | $ 1,000 | $ 100 | 7,300 |
Cumulative undistributed foreign earnings | 97,200 |  |  |
Tax positions related to a prior period | 6,219 | $ 4,993 | $ 5,787 | $ 7,520
Deferred tax assets related to operating loss carryforwards, not recorded | 3,600 |  |  |
Federal and Foreign |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Net operating loss carryforwards | 208,400 |  |  |
State |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Net operating loss carryforwards | 26,900 |  |  |
Tax credit carryforwards | 3,600 |  |  |
Indefinite-Lived Carryforwards |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Tax credit carryforwards | 2,300 |  |  |
Federal |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Tax credit carryforwards | 5,700 |  |  |
Other Noncurrent Liabilities |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Tax positions related to a prior period | $ 2,600 |  |  |

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