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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)