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Income Taxes Schedule of income tax rate reconciliation (Details) | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract] |  |  |
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 21.00% | 21.00% | 35.00%
Effective Income Tax Rate Reconciliation, Tax Exempt Income, Percent | 2.00% | 1.80% | 2.80%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Life Insurance, Percent | 0.80% | 1.10% | 1.40%
Effective Income Tax Rate Reconciliation, Tax Credit, Investment, Percent | 1.50% | 1.30% | 1.90%
Effective Income Tax Rate Reconciliation, Deduction, Employee Stock Ownership Plan Dividend, Percent | 0.60% | 0.60% | 1.00%
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent | 0.00% | 0.00% | 1.00%
Effective Income Tax Rate Reconciliation, Disposition of Asset, Percent | 0.00% | (0.60%) | 0.00%
Effective Income Tax Rate Reconciliation, Other Adjustments, Percent | (1.60%) | (0.30%) | 0.00%
Effective Income Tax Rate Reconciliation, Percent | 17.70% | 15.90% | 28.90%

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- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the income tax rates. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I) -URI http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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