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Other Comprehensive Income (Loss) (Tables) | 12 Months Ended
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Dec. 31, 2018
Equity [Abstract] |
Schedule of Accumulated Other Comprehensive Income (Loss) | The tables below summarize the changes in accumulated other comprehensive income (loss) by component for the years ended December 31, 2018 and 2017, net of tax:
December 31, 2018 |  | Unrealized Gains and Losses on Available-for-Sale Securities |  | Postretirement Benefit Items |  | Total
Beginning Balance |  | $ | (2,335 | ) |  | $ | (285 | ) |  | $ | (2,620 | )
Other Comprehensive Income (Loss) Before Reclassification |  | (3,866 | ) |  | (77 | ) |  | (3,943 | )
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) |  | (558 | ) |  | 23 |  |  | (535 | )
Net Current Period Other |  |  |  |  |  |  |  |  |
Comprehensive Income (Loss) |  | (4,424 | ) |  | (54 | ) |  | (4,478 | )
Ending Balance |  | $ | (6,759 | ) |  | $ | (339 | ) |  | $ | (7,098 | )
December 31, 2017 |  | Unrealized Gains and Losses on Available-for-Sale Securities |  | Postretirement Benefit Items |  | Total
Beginning Balance |  | $ | (6,312 | ) |  | $ | (92 | ) |  | $ | (6,404 | )
Other Comprehensive Income (Loss) Before Reclassification |  | 4,778 |  |  | (143 | ) |  | 4,635 |
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) |  | (387 | ) |  | 5 |  |  | (382 | )
Net Current Period Other |  |  |  |  |  |  |  |  |
Comprehensive Income (Loss) |  | 4,391 |  |  | (138 | ) |  | 4,253 |
ASU 2018-02 Adoption |  | (414 | ) |  | (55 | ) |  | (469 | )
Ending Balance |  | $ | (2,335 | ) |  | $ | (285 | ) |  | $ | (2,620 | )
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, 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 |  |  |
The table below summarizes the classifications out of accumulated other comprehensive income (loss) by component for the year ended December 31, 2017:
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 |  | $ | 596 |  |  | Net Gain (Loss) on Securities
|  | (209 | ) |  | Income Tax Expense
|  | 387 |  |  | Net of Tax
Amortization of Post Retirement Plan Items |  |  |  |  |
Actuarial Gains (Losses) |  | $ | (8 | ) |  | Salaries and Employee Benefits
|  | 3 |  |  | Income Tax Expense
|  | (5 | ) |  | Net of Tax
Total Reclassifications for the Period |  | $ | 382 |  |  |
The table below summarizes the classifications out of accumulated other comprehensive income (loss) by component for the year ended December 31, 2016:
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 |  | $ | 1,979 |  |  | Net Gain (Loss) on Securities
|  | (693 | ) |  | Income Tax Expense
|  | 1,286 |  |  | Net of Tax
Amortization of Post Retirement Plan Items |  |  |  |  |
Actuarial Gains (Losses) |  | $ | (6 | ) |  | Salaries and Employee Benefits
|  | 2 |  |  | Income Tax Expense
|  | (4 | ) |  | Net of Tax
Total Reclassifications for the Period |  | $ | 1,282 |  |  |

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669686-108580 + Details
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