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Income Taxes (Reconciliation of Statutory and Effective Tax Rates) (Details)
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Income Tax Disclosure [Abstract]      
Statutory tax rate 21.00% 21.00% 21.00%
Effective tax rate increase (decrease) - State taxes net of federal benefit 2.70% 2.60% 2.00%
Effective tax rate increase (decrease) - Tax-exempt interest (1.20%) (0.90%) (1.70%)
Effective tax rate increase (decrease) - Life insurance (0.80%) (0.80%) (1.60%)
Effective tax rate increase (decrease) - Tax credits (3.20%) (4.40%) (6.00%)
Effective tax rate increase (decrease) - unrecognized tax benefits, percent 0.10% 0.30% (1.60%)
Effective tax rate increase (decrease) - subsidiary liquidation, percent (1.20%)
Effective tax rate increase (decrease) - Other (0.40%) 0.30% 1.50%
Effective tax rate 18.20% 18.10% 12.40%