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Comprehensive Income (Tables) | 3 Months Ended
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Mar. 31, 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-month period months ended March 31, 2016 and 2015:
Schedule of Comprehensive Income
| Three Months Ended March 31,
|  |  | Tax |  |
| Before-Tax |  | (Expense) |  | Net-of-Tax
| Amount |  | Benefit |  | Amount
2016 |  |  |  |  |
Net Unrealized Securities Holding Gains Arising During the Period | $ | 4,010 |  |  | $ | (1,573 | ) |  | $ | 2,437 |
Amortization of Net Retirement Plan Actuarial Loss | 166 |  |  | (65 | ) |  | 101 |
Accretion of Net Retirement Plan Prior Service Credit | (3 | ) |  | 1 |  |  | (2 | )
Other Comprehensive Income | $ | 4,173 |  |  | $ | (1,637 | ) |  | $ | 2,536 |
2015 |  |  |  |  |
Net Unrealized Securities Holding Gains Arising During the Period | $ | 1,225 |  |  | $ | (480 | ) |  | $ | 745 |
Reclassification Adjustment for Securities Losses Included in Net Income | 90 |  |  | (35 | ) |  | 55 |
Amortization of Net Retirement Plan Actuarial Loss | 192 |  |  | (75 | ) |  | 117 |
Accretion of Net Retirement Plan Prior Service Credit | (13 | ) |  | 6 |  |  | (7 | )
Other Comprehensive Income | $ | 1,494 |  |  | $ | (584 | ) |  | $ | 910 |
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: |  |  |  |  |  |  |
December 31, 2015 | $ | 629 |  |  | $ | (7,893 | ) |  | $ | (708 | ) |  | $ | (7,972 | )
Other comprehensive income or loss before reclassifications | 2,437 |  |  | — |  |  | — |  |  | 2,437 |
Amounts reclassified from accumulated other comprehensive income | — |  |  | 101 |  |  | (2 | ) |  | 99 |
Net current-period other comprehensive income | 2,437 |  |  | 101 |  |  | (2 | ) |  | 2,536 |
March 31, 2016 | $ | 3,066 |  |  | $ | (7,792 | ) |  | $ | (710 | ) |  | $ | (5,436 | )
December 31, 2014 | $ | 2,539 |  |  | $ | (9,255 | ) |  | $ | (450 | ) |  | $ | (7,166 | )
Other comprehensive income or loss before reclassifications | 745 |  |  | — |  |  | — |  |  | 745 |
Amounts reclassified from accumulated other comprehensive income | 55 |  |  | 117 |  |  | (7 | ) |  | 165 |
Net current-period other comprehensive income | 800 |  |  | 117 |  |  | (7 | ) |  | 910 |
March 31, 2015 | $ | 3,339 |  |  | $ | (9,138 | ) |  | $ | (457 | ) |  | $ | (6,256 | )
(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: |  |  |  |
March 31, 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) |  | (166 | ) | (2) | Salaries and Employee Benefits
|  | (163 | ) |  | Total before Tax
|  | 64 |  |  | Provision for Income Taxes
|  | $ | (99 | ) |  | Net of Tax
Total reclassifications for the period |  | $ | (99 | ) |  | Net of Tax
March 31, 2015 |  |  |  |
Unrealized gains and losses on available-for-sale securities |  | $ | (90 | ) |  | Gain on Securities Transactions
|  | (90 | ) |  | Total before Tax
|  | 35 |  |  | Provision for Income Taxes
|  | $ | (55 | ) |  | 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
|  | 69 |  |  | Provision for Income Taxes
|  | $ | (110 | ) |  | Net of Tax
Total reclassifications for the period |  | $ | (165 | ) |  | 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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