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Postretirement Benefits (Net Periodic Cost) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Nov. 30, 2022 | Nov. 30, 2021 | Nov. 30, 2020
Retirement Benefits [Abstract] |  |  |
Interest cost | $ 1,853 | $ 1,593 | $ 1,950
Amortization of prior service cost | 0 | 85 | 425
Service cost | 1,132 | 1,152 | 1,077
Amortization of net actuarial loss | 998 | 1,443 | 912
Total | $ 3,983 | $ 4,273 | $ 4,364

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