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Consolidated Statement of Comprehensive Income (Parentheticals) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Adjustment For Actuarially Determined Liabilities |  |  |
Other comprehensive income, tax expense | $ (234) | $ 914 | $ 1,664

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