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Consolidated Statements of Comprehensive Income Statement - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Nov. 30, 2019 | Nov. 30, 2018 | Nov. 30, 2017
Statement of Comprehensive Income [Abstract] |  |  |
Net income | $ 268,775 | $ 170,365 | $ 180,595
Net actuarial gain (loss) arising during the period | (10,268) | 8,216 | (3,143)
Amortization of net actuarial loss | 218 | 336 | 142
Amortization of prior service cost | 1,556 | 1,556 | 1,556
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), before Tax | 356 | 0 | 0
Other comprehensive income (loss) before tax | (8,138) | 10,108 | (1,445)
Income tax benefit (expense) related to items of other comprehensive income (loss) | 2,197 | (2,749) | 578
Other comprehensive income (loss), net of tax | (5,941) | 7,359 | (867)
Comprehensive income | $ 262,834 | $ 177,724 | $ 179,728

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