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Accumulated Other Comprehensive Loss - Narrative (Details) - USD ($) $ in Thousands | 12 Months Ended
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Nov. 30, 2020 | Nov. 30, 2019 | Nov. 30, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Amortization of prior service cost | $ 425 | $ 1,556 | $ 1,556

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