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Comprehensive Income (Tables) | 12 Months Ended
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Dec. 31, 2017
Other Comprehensive Income (Loss), Net of Tax [Abstract] |
Schedule of Comprehensive Income (Loss) | The following table presents the components of other comprehensive income for the years ended December 31, 2017, 2016 and 2015:
Schedule of Comprehensive Income
| Before-Tax Amount |  | Tax Expense (Benefit) |  | Net-of-Tax Amount
2017 |  |  |  |  |
Net Unrealized Securities Holding Losses Arising During the Period | $ | (1,505 | ) |  | $ | 565 |  |  | $ | (940 | )
Reclassification Adjustment for Securities Losses Included in Net Income | 448 |  |  | (111 | ) |  | 337 |
Net Retirement Plan Loss | 287 |  |  | (73 | ) |  | 214 |
Amortization of Net Retirement Plan Actuarial Loss | 411 |  |  | (49 | ) |  | 362 |
Accretion of Net Retirement Plan Prior Service Credit | (11 | ) |  | 3 |  |  | (8 | )
Other Comprehensive Income (Loss) | $ | (370 | ) |  | $ | 335 |  |  | $ | (35 | )
2016 |  |  |  |  |
Net Unrealized Securities Holding Losses Arising During the Period | $ | (1,672 | ) |  | $ | 648 |  |  | $ | (1,024 | )
Reclassification Adjustment for Securities Losses Included in Net Income | 22 |  |  | (9 | ) |  | 13 |
Net Retirement Plan Loss | 3,017 |  |  | (1,296 | ) |  | 1,721 |
Amortization of Net Retirement Plan Actuarial Loss | 716 |  |  | (281 | ) |  | 435 |
Accretion of Net Retirement Plan Prior Service Credit | (12 | ) |  | 5 |  |  | (7 | )
Other Comprehensive Income | $ | 2,071 |  |  | $ | (933 | ) |  | $ | 1,138 |
2015 |  |  |  |  |
Net Unrealized Securities Holding Losses Arising During the Period | $ | (3,017 | ) |  | $ | 1,185 |  |  | $ | (1,832 | )
Reclassification Adjustment for Securities Gains Included in Net Income | (129 | ) |  | 51 |  |  | (78 | )
Net Retirement Plan Losses | 1,395 |  |  | (547 | ) |  | 848 |
Net Retirement Plan Prior Service Credit | (368 | ) |  | 144 |  |  | (224 | )
Amortization of Net Retirement Plan Actuarial Loss | 846 |  |  | (332 | ) |  | 514 |
Accretion of Net Retirement Plan Prior Service Credit | (56 | ) |  | 22 |  |  | (34 | )
Other Comprehensive Loss | $ | (1,329 | ) |  | $ | 523 |  |  | $ | (806 | )
Schedule of Accumulated Other Comprehensive Income (Loss) | The following table presents the changes in accumulated other comprehensive income by component:
Changes in Accumulated Other Comprehensive Income (Loss) by Component (1)
| Unrealized |  | Defined Benefit Plan Items |  |
| Gains and |  |  |  |  |  |
| Losses on |  |  |  | Net Prior |  |
| Available-for- |  | Net Gain |  | Service |  |
| Sale Securities |  | (Loss) |  | (Cost ) Credit |  | Total
For the Year-To-Date periods ended: |  |  |  |  |  |  |
December 31, 2016 | $ | (382 | ) |  | $ | (5,737 | ) |  | $ | (715 | ) |  | $ | (6,834 | )
Other comprehensive income (loss) before reclassifications | (940 | ) |  | 214 |  |  | — |  |  | (726 | )
Amounts reclassified from accumulated other comprehensive income (loss) | 337 |  |  | 362 |  |  | (8 | ) |  | 691 |
Net current-period other comprehensive loss | (603 | ) |  | 576 |  |  | (8 | ) |  | (35 | )
Reclassification due to the adoption of ASU No. 2018-02 | (265 | ) |  | (1,219 | ) |  | (161 | ) |  | (1,645 | )
December 31, 2017 | $ | (1,250 | ) |  | $ | (6,380 | ) |  | $ | (884 | ) |  | $ | (8,514 | )
December 31, 2015 | $ | 629 |  |  | $ | (7,893 | ) |  | $ | (708 | ) |  | $ | (7,972 | )
Other comprehensive income (loss) before reclassifications | (1,024 | ) |  | 1,721 |  |  | — |  |  | 697 |
Amounts reclassified from accumulated other comprehensive income (loss) | 13 |  |  | 435 |  |  | (7 | ) |  | 441 |
Net current-period other comprehensive income | (1,011 | ) |  | 2,156 |  |  | (7 | ) |  | 1,138 |
December 31, 2016 | $ | (382 | ) |  | $ | (5,737 | ) |  | $ | (715 | ) |  | $ | (6,834 | )
December 31, 2014 | $ | 2,539 |  |  | $ | (9,255 | ) |  | $ | (450 | ) |  | $ | (7,166 | )
Other comprehensive income (loss) before reclassifications | (1,832 | ) |  | 848 |  |  | (224 | ) |  | (1,208 | )
Amounts reclassified from accumulated other comprehensive income (loss) | (78 | ) |  | 514 |  |  | (34 | ) |  | 402 |
Net current-period other comprehensive income (loss) | (1,910 | ) |  | 1,362 |  |  | (258 | ) |  | (806 | )
December 31, 2015 | $ | 629 |  |  | $ | (7,893 | ) |  | $ | (708 | ) |  | $ | (7,972 | )
(1) All amounts are net of tax. Amounts in parentheses indicate debits.
Reclassification out of Accumulated Other Comprehensive Income | The following table presents the reclassifications out of accumulated other comprehensive income:
Reclassifications Out of Accumulated Other Comprehensive Income (1)
|  | Amounts Reclassified |  |
Details about Accumulated Other |  | from Accumulated Other |  | Affected Line Item in the Statement
Comprehensive Income Components |  | Comprehensive Income |  | Where Net Income Is Presented
For the Year-to-date periods ended: |  |  |  |
December 31, 2017 |  |  |  |
Unrealized gains and losses on available-for-sale securities |  |  |  |
|  | $ | (448 | ) |  | Loss on Securities Transactions, Net
|  | (448 | ) |  | Total before tax
|  | 111 |  |  | Provision for Income Taxes
|  | $ | (337 | ) |  | Net of tax
Amortization of defined benefit pension items |  |  |  |
Prior-service costs |  | $ | 11 |  | (2) | Salaries and Employee Benefits
Actuarial gains/(losses) |  | (411 | ) | (2) | Salaries and Employee Benefits
|  | (400 | ) |  | Total before tax
|  | 46 |  |  | Provision for Income Taxes
|  | $ | (354 | ) |  | Net of tax
Total reclassifications for the period |  | $ | (691 | ) |  | Net of tax
December 31, 2016 |  |  |  |
Unrealized gains and losses on available-for-sale securities |  |  |  |
|  | $ | (22 | ) |  | Loss on Securities Transactions, Net
|  | (22 | ) |  | Total before tax
|  | 9 |  |  | Provision for Income Taxes
|  | $ | (13 | ) |  | Net of tax
Amortization of defined benefit pension items |  |  |  |
Prior-service costs |  | 12 |  | (2) | Salaries and Employee Benefits
Actuarial gains/(losses) |  | $ | (716 | ) | (2) | Salaries and Employee Benefits
|  | (704 | ) |  | Total before tax
|  | 276 |  |  | Provision for Income Taxes
|  | $ | (428 | ) |  | Net of tax
Total reclassifications for the period |  | $ | (441 | ) |  | Net of tax
Reclassifications Out of Accumulated Other Comprehensive Income (1)
|  | Amounts Reclassified |  |
Details about Accumulated Other |  | from Accumulated Other |  | Affected Line Item in the Statement
Comprehensive Income Components |  | Comprehensive Income |  | Where Net Income Is Presented
December 31, 2015 |  |  |  |
Unrealized gains and losses on available-for-sale securities |  |  |  |
|  | $ | 129 |  |  | Gain on Securities Transactions, Net
|  | 129 |  |  | Total before tax
|  | (51 | ) |  | Provision for Income Taxes
|  | $ | 78 |  |  | Net of tax
Amortization of defined benefit pension items |  |  |  |
Prior-service costs |  | 56 |  | (2) | Salaries and Employee Benefits
Actuarial gains/(losses) |  | $ | (846 | ) | (2) | Salaries and Employee Benefits
|  | (790 | ) |  | Total before tax
|  | 310 |  |  | Provision for Income Taxes
|  | $ | (480 | ) |  | Net of tax
Total reclassifications for the period |  | $ | (402 | ) |  | Net of tax
(1) Amounts in parentheses indicate debits to profit/loss. (2) These accumulated other comprehensive income components are included in the computation of net periodic pension cost (see pension footnote for additional details).

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- Definition Tabular disclosure of components of comprehensive income (loss). Includes, but is not limited to, foreign currency translation adjustments, foreign currency transactions designated as economic hedges of a net investment in foreign entity, gain (loss) and prior service cost (credit) for pension plans and other postretirement benefit plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66004124&loc=d3e526-108580 + Details
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