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Income Taxes Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation (Details) | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Effective Income Tax Rate Reconciliation, Percent [Abstract] |  |  |
Statutory Federal Tax Rate | 21.00% | 21.00% | 35.00%
Tax Cuts and Jobs Act impact on deferred remeasurement | 0.000 | 0.000 | (0.028)
Tax-Exempt Income | (2.70%) | (3.10%) | (6.40%)
Nondeductible Interest Expense | 0.20% | 0.10% | 0.10%
State Taxes, Net of Federal Income Tax Benefit | 2.30% | 2.40% | 1.80%
Tax benefit from stock based compensation | (0.30%) | (0.40%) | (0.30%)
Other Items, Net | (0.10%) | (0.10%) | (1.00%)
Effective Tax Rate | 20.40% | 19.90% | 26.40%

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