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Comprehensive Income (Tables) | 9 Months Ended
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Sep. 30, 2016
Comprehensive Income [Abstract] |
Schedule of Comprehensive Income (Loss) [Table Text Block] | The following table presents the components of other comprehensive income for the three- and nine-month periods ended September 30, 2016 and 2015:
Schedule of Comprehensive Income |  |  |  |  |  |
| Three Months Ended September 30, |  | Nine Months Ended September 30,
|  |  | Tax |  |  |  |  |  | Tax |  |
| Before-Tax |  | (Expense) |  | Net-of-Tax |  | Before-Tax |  | (Expense) |  | Net-of-Tax
| Amount |  | Benefit |  | Amount |  | Amount |  | Benefit |  | Amount
2016 |  |  |  |  |  |  |  |  |  |  |
Net Unrealized Securities Holding (Losses) Gains Arising During the Period | $ | (1,264 | ) |  | $ | 454 |  |  | $ | (810 | ) |  | $ | 3,868 |  |  | $ | (1,559 | ) |  | $ | 2,309 |
Reclassification Adjustment for Securities Gains Included in Net Income | — |  |  | — |  |  | — |  |  | (144 | ) |  | 56 |  |  | (88 | )
Amortization of Net Retirement Plan Actuarial Loss | 181 |  |  | (70 | ) |  | 111 |  |  | 503 |  |  | (189 | ) |  | 314 |
Accretion of Net Retirement Plan Prior Service Credit | (3 | ) |  | 2 |  |  | (1 | ) |  | (7 | ) |  | 2 |  |  | (5 | )
Other Comprehensive Income | $ | (1,086 | ) |  | $ | 386 |  |  | $ | (700 | ) |  | $ | 4,220 |  |  | $ | (1,690 | ) |  | $ | 2,530 |
2015 |  |  |  |  |  |  |  |  |  |  |
Net Unrealized Securities Holding Gains Arising During the Period | $ | 892 |  |  | $ | (349 | ) |  | $ | 543 |  |  | $ | 631 |  |  | $ | (247 | ) |  | $ | 384 |
Reclassification Adjustment for Securities Losses Included in Net Income | — |  |  | — |  |  | — |  |  | (106 | ) |  | 41 |  |  | (65 | )
Amortization of Net Retirement Plan Actuarial Loss | 192 |  |  | (75 | ) |  | 117 |  |  | 579 |  |  | (227 | ) |  | 352 |
Accretion of Net Retirement Plan Prior Service Credit | (13 | ) |  | 4 |  |  | (9 | ) |  | (41 | ) |  | 16 |  |  | (25 | )
Other Comprehensive Income | $ | 1,071 |  |  | $ | (420 | ) |  | $ | 651 |  |  | $ | 1,063 |  |  | $ | (417 | ) |  | $ | 646 |
Changes in Accumulated Other Comprehensive Income By Component [Table Text Block] | 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 Quarter-To-Date periods ended: |  |  |  |  |  |  |
June 30, 2016 | $ | 3,660 |  |  | $ | (7,690 | ) |  | $ | (712 | ) |  | $ | (4,742 | )
Other comprehensive income or loss before reclassifications | (810 | ) |  | — |  |  | — |  |  | (810 | )
Amounts reclassified from accumulated other comprehensive income | — |  |  | 111 |  |  | (1 | ) |  | 110 |
Net current-period other comprehensive income | (810 | ) |  | 111 |  |  | (1 | ) |  | (700 | )
September 30, 2016 | $ | 2,850 |  |  | $ | (7,579 | ) |  | $ | (713 | ) |  | $ | (5,442 | )
June 30, 2015 | $ | 2,315 |  |  | $ | (9,020 | ) |  | $ | (466 | ) |  | $ | (7,171 | )
Other comprehensive income or loss before reclassifications | 543 |  |  | — |  |  | — |  |  | 543 |
Amounts reclassified from accumulated other comprehensive income | — |  |  | 117 |  |  | (9 | ) |  | 108 |
Net current-period other comprehensive income | 543 |  |  | 117 |  |  | (9 | ) |  | 651 |
September 30, 2015 | $ | 2,858 |  |  | $ | (8,903 | ) |  | $ | (475 | ) |  | $ | (6,520 | )
For the Year-To-Date periods ended: |  |  |  |  |  |  |
December 31, 2015 | $ | 629 |  |  | $ | (7,893 | ) |  | $ | (708 | ) |  | $ | (7,972 | )
Other comprehensive income or loss before reclassifications | 2,309 |  |  | — |  |  | — |  |  | 2,309 |
Amounts reclassified from accumulated other comprehensive income | (88 | ) |  | 314 |  |  | (5 | ) |  | 221 |
Net current-period other comprehensive income | 2,221 |  |  | 314 |  |  | (5 | ) |  | 2,530 |
September 30, 2016 | $ | 2,850 |  |  | $ | (7,579 | ) |  | $ | (713 | ) |  | $ | (5,442 | )
December 31, 2014 | $ | 2,539 |  |  | $ | (9,255 | ) |  | $ | (450 | ) |  | $ | (7,166 | )
Other comprehensive income or loss before reclassifications | 384 |  |  | — |  |  | — |  |  | 384 |
Amounts reclassified from accumulated other comprehensive income | (65 | ) |  | 352 |  |  | (25 | ) |  | 262 |
Net current-period other comprehensive income | 319 |  |  | 352 |  |  | (25 | ) |  | 646 |
September 30, 2015 | $ | 2,858 |  |  | $ | (8,903 | ) |  | $ | (475 | ) |  | $ | (6,520 | )
(1) All amounts are net of tax. Amounts in parentheses indicate debits.
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] | 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 (Loss) Components |  | Comprehensive Income |  | Where Net Income Is Presented
For the Quarter-to-date periods ended: |  |  |  |
September 30, 2016 |  |  |  |
Unrealized gains and losses on available-for-sale securities |  | $ | — |  |  | Gain on Securities Transactions
|  | — |  |  | Total before Tax
|  | — |  |  | Provision for Income Taxes
|  | $ | — |  |  | Net of Tax
Amortization of defined benefit pension items: |  |  |  |
Prior-service costs |  | $ | 3 |  | (2) | Salaries and Employee Benefits
Actuarial gains/(losses) |  | (181 | ) | (2) | Salaries and Employee Benefits
|  | (178 | ) |  | Total before Tax
|  | 68 |  |  | Provision for Income Taxes
|  | $ | (110 | ) |  | Net of Tax
Total reclassifications for the period |  | $ | (110 | ) |  | Net of Tax
September 30, 2015 |  |  |  |
Unrealized gains and losses on available-for-sale securities |  | $ | — |  |  | Gain on Securities Transactions
|  | — |  |  | Total before Tax
|  | — |  |  | Provision for Income Taxes
|  | $ | — |  |  | Net of Tax
Amortization of defined benefit pension items: |  |  |  |
Prior-service costs |  | $ | 13 |  | (2) | Salaries and Employee Benefits
Actuarial gains/(losses) |  | (192 | ) | (2) | Salaries and Employee Benefits
|  | (179 | ) |  | Total before Tax
|  | 71 |  |  | Provision for Income Taxes
|  | $ | (108 | ) |  | Net of Tax
Total reclassifications for the period |  | $ | (108 | ) |  | 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 (Loss) Components |  | Comprehensive Income |  | Where Net Income Is Presented
For the Year-to-date periods ended: |  |  |  |
September 30, 2016 |  |  |  |
Unrealized gains and losses on available-for-sale securities |  | $ | 144 |  |  | Gain on Securities Transactions
|  | 144 |  |  | Total before Tax
|  | (56 | ) |  | Provision for Income Taxes
|  | $ | 88 |  |  | Net of Tax
Amortization of defined benefit pension items: |  |  |  |
Prior-service costs |  | $ | 7 |  | (2) | Salaries and Employee Benefits
Actuarial gains/(losses) |  | (503 | ) | (2) | Salaries and Employee Benefits
|  | (496 | ) |  | Total before Tax
|  | 187 |  |  | Provision for Income Taxes
|  | $ | (309 | ) |  | Net of Tax
Total reclassifications for the period |  | $ | (221 | ) |  | Net of Tax
September 30, 2015 |  |  |  |
Unrealized gains and losses on available-for-sale securities |  | $ | 106 |  |  | Gain on Securities Transactions
|  | 106 |  |  | Total before Tax
|  | (41 | ) |  | Provision for Income Taxes
|  | $ | 65 |  |  | Net of Tax
Amortization of defined benefit pension items: |  |  |  |
Prior-service costs |  | 41 |  | (2) | Salaries and Employee Benefits
Actuarial gains/(losses) |  | $ | (579 | ) | (2) | Salaries and Employee Benefits
|  | (538 | ) |  | Total before Tax
|  | 211 |  |  | Provision for Income Taxes
|  | $ | (327 | ) |  | Net of Tax
Total reclassifications for the period |  | $ | (262 | ) |  | 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.

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