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Basis of Accounting and Consolidation - Schedule of Amounts Reclassified from Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Realized gains on available-for-sale securities | $ 11 | $ 95 | $ 88 | $ 913
Tax effect | (6,105) | (3,720) | (10,130) | (9,988)
Total reclassifications out of accumulated other comprehensive income | 8 | 67 | 62 | 648
Accumulated Defined Benefit Plans Adjustment Attributable to Parent |  |  |  |
Realized gains on available-for-sale securities | 11 | 95 | 88 | 913
Tax effect | $ (3) | $ (28) | $ (26) | $ (265)

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