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Federal Income Taxes (Tables) | 9 Months Ended
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Sep. 30, 2021
Income Tax Disclosure [Abstract] |
Summary of federal income tax expense | The reconciliation of the provision for federal income taxes and the amount computed at the federal statutory tax rate of 21% of income before federal income tax expense is as follows for the:
| Three Months Ended September 30 |  | Nine Months Ended September 30
| 2021 |  | 2020 |  | 2021 |  | 2020
Income taxes at statutory rate | $ | 1,176 |  |  | $ | 1,069 |  |  | $ | 3,684 |  |  | $ | 2,752 |
Effect of nontaxable income |  |  |  |  |  |  |
Interest income on tax exempt municipal securities | (143) |  |  | (176) |  |  | (474) |  |  | (570) |
Earnings on corporate owned life insurance policies | (43) |  |  | (40) |  |  | (153) |  |  | (301) |
Other | (9) |  |  | (4) |  |  | (22) |  |  | (12) |
Total effect of nontaxable income | (195) |  |  | (220) |  |  | (649) |  |  | (883) |
Effect of nondeductible expenses | 11 |  |  | 7 |  |  | 23 |  |  | 14 |
Effect of tax credits | (76) |  |  | (122) |  |  | (220) |  |  | (388) |
Federal income tax expense | $ | 916 |  |  | $ | 734 |  |  | $ | 2,838 |  |  | $ | 1,495 |

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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: 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=121826272&loc=d3e32687-109319 + Details
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