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Other Comprehensive Income (Loss) (Tables) | 12 Months Ended
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Dec. 31, 2020
Equity [Abstract] |
Schedule of Accumulated Other Comprehensive Income (Loss) | Other Comprehensive Income (Loss) The tables below summarize the changes in accumulated other comprehensive income (loss) by component for the years ended December 31, 2020 and 2019, net of tax:
December 31, 2020 |  | Unrealized Gains and Losses on Available-for-Sale Securities |  | Postretirement Benefit Items |  | Total
Beginning Balance |  | $ | 15,673 |  |  | $ | (568) |  |  | $ | 15,105 |
Other Comprehensive Income (Loss) Before Reclassification |  | 23,494 |  |  | — |  |  | 23,494 |
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) |  | (3,224) |  |  | — |  |  | (3,224) |
Net Current Period Other |  |  |  |  |  |
Comprehensive Income (Loss) |  | 20,270 |  |  | — |  |  | 20,270 |
Ending Balance |  | $ | 35,943 |  |  | $ | (568) |  |  | $ | 35,375 |
December 31, 2019 |  | Unrealized Gains and Losses on Available-for-Sale Securities |  | Postretirement Benefit Items |  | Total
Beginning Balance |  | $ | (6,759) |  |  | $ | (339) |  |  | $ | (7,098) |
Other Comprehensive Income (Loss) Before Reclassification |  | 23,418 |  |  | (256) |  |  | 23,162 |
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) |  | (986) |  |  | 27 |  |  | (959) |
Net Current Period Other |  |  |  |  |  |
Comprehensive Income (Loss) |  | 22,432 |  |  | (229) |  |  | 22,203 |
Ending Balance |  | $ | 15,673 |  |  | $ | (568) |  |  | $ | 15,105 |
Schedule of Classifications Out of Accumulated Other Comprehensive Income (Loss) by Component | The table below summarizes the classifications out of accumulated other comprehensive income (loss) by component for the year ended December 31, 2020:
Details about Accumulated Other Comprehensive Income (Loss) Components |  | Amount Reclassified From Accumulated Other Comprehensive Income (Loss) |  | Affected Line Item in the Statement Where Net Income is Presented
Unrealized Gains and Losses on |  |  |  |
Available-for-Sale Securities |  | $ | 4,081 |  |  | Net Gain (Loss) on Securities
|  | (857) |  |  | Income Tax Expense
|  | 3,224 |  |  | Net of Tax
Amortization of Post Retirement Plan Items |  |  |  |
Actuarial Gains (Losses) |  | $ | — |  |  | Salaries and Employee Benefits
|  | — |  |  | Income Tax Expense
|  | — |  |  | Net of Tax
Total Reclassifications for the Period |  | $ | 3,224 |  |  |
The table below summarizes the classifications out of accumulated other comprehensive income (loss) by component for the year ended December 31, 2019:
Details about Accumulated Other Comprehensive Income (Loss) Components |  | Amount Reclassified From Accumulated Other Comprehensive Income (Loss) |  | Affected Line Item in the Statement Where Net Income is Presented
Unrealized Gains and Losses on |  |  |  |
Available-for-Sale Securities |  | $ | 1,248 |  |  | Net Gain (Loss) on Securities
|  | (262) |  |  | Income Tax Expense
|  | 986 |  |  | Net of Tax
Amortization of Post Retirement Plan Items |  |  |  |
Actuarial Gains (Losses) |  | $ | (37) |  |  | Salaries and Employee Benefits
|  | 10 |  |  | Income Tax Expense
|  | (27) |  |  | Net of Tax
Total Reclassifications for the Period |  | $ | 959 |  |  |
The table below summarizes the classifications out of accumulated other comprehensive income (loss) by component for the year ended December 31, 2018:
Details about Accumulated Other Comprehensive Income (Loss) Components |  | Amount Reclassified From Accumulated Other Comprehensive Income (Loss) |  | Affected Line Item in the Statement Where Net Income is Presented
Unrealized Gains and Losses on |  |  |  |
Available-for-Sale Securities |  | $ | 706 |  |  | Net Gain (Loss) on Securities
|  | (148) |  |  | Income Tax Expense
|  | 558 |  |  | Net of Tax
Amortization of Post Retirement Plan Items |  |  |  |
Actuarial Gains (Losses) |  | $ | (32) |  |  | Salaries and Employee Benefits
|  | 9 |  |  | Income Tax Expense
|  | (23) |  |  | Net of Tax
Total Reclassifications for the Period |  | $ | 535 |  |  |

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