Schedule of Amounts Recognized in Accumulated Other Comprehensive Income | The following table identifies the related tax effects allocated to each component of other comprehensive income in the Consolidated Statements of Comprehensive Income as of December 31. Reclassification adjustments related to securities available for sale are included in the “Net securities gains (losses)” line in the Consolidated Statements of Income and reclassification adjustments related to losses on derivatives are included in the "Other operating expenses" line in the Consolidated Statements of Income. | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 2016 | | 2015 | | 2014 | | Pretax Amount | | Tax (Expense) Benefit | | Net of Tax Amount | | Pretax Amount | | Tax (Expense) Benefit | | Net of Tax Amount | | Pretax Amount | | Tax (Expense) Benefit | | Net of Tax Amount | | (dollars in thousands) | Unrealized gains (losses) on securities: | | | | | | | | | | | | | | | | | | Unrealized holding (losses) gains on securities arising during the period | $ | (6,304 | ) | | $ | 2,206 |
| | $ | (4,098 | ) | | $ | 2,798 |
| | $ | (978 | ) | | $ | 1,820 |
| | $ | 25,153 |
| | $ | (8,803 | ) | | $ | 16,350 |
| Reclassification adjustment for (gains) losses on securities included in net income | (617 | ) | | 216 |
| | (401 | ) | | 153 |
| | (54 | ) | | 99 |
| | (550 | ) | | 193 |
| | (357 | ) | Total unrealized (losses) gains on securities | (6,921 | ) | | 2,422 |
| | (4,499 | ) | | 2,951 |
| | (1,032 | ) | | 1,919 |
| | 24,603 |
| | (8,610 | ) | | 15,993 |
| Unrealized gains (losses) on derivatives: | | | | | | | | | | | | | | | | | | Unrealized holding (losses) gains on derivatives arising during the period | (479 | ) | | 168 |
| | (311 | ) | | 450 |
| | (158 | ) | | 292 |
| | 472 |
| | (165 | ) | | 307 |
| Reclassification adjustment for gains on derivatives included in net income | (70 | ) | | 24 |
| | (46 | ) | | (49 | ) | | 17 |
| | (32 | ) | | (10 | ) | | 3 |
| | (7 | ) | Total unrealized (losses) gains on derivatives | (549 | ) | | 192 |
| | (357 | ) | | 401 |
| | (141 | ) | | 260 |
| | 462 |
| | (162 | ) | | 300 |
| Unrealized gains (losses) for postretirement obligations: | | | | | | | | | | | | | | | | | | Transition obligation | — |
| | — |
| | — |
| | — |
| | — |
| | — |
| | — |
| | — |
| | — |
| Net gain (loss) | 331 |
| | (116 | ) | | 215 |
| | (102 | ) | | 36 |
| | (66 | ) | | (313 | ) | | 109 |
| | (204 | ) | Total unrealized gains (losses) for postretirement obligations | 331 |
| | (116 | ) | | 215 |
| | (102 | ) | | 36 |
| | (66 | ) | | (313 | ) | | 109 |
| | (204 | ) | Total other comprehensive (loss) income | $ | (7,139 | ) | | $ | 2,498 |
| | $ | (4,641 | ) | | $ | 3,250 |
| | $ | (1,137 | ) | | $ | 2,113 |
| | $ | 24,752 |
| | $ | (8,663 | ) | | $ | 16,089 |
|
The following table sets forth the amounts recognized in accumulated other comprehensive income that have not yet been recognized as components of net periodic benefit costs as of December 31: | | | | | | | | | | | | | | 2016 | | 2015 | | 2014 | | (dollars in thousands) | Amounts recognized in accumulated other comprehensive income, net of tax: | | | | | | Net (gain) loss | $ | (225 | ) | | $ | (10 | ) | | $ | (76 | ) | Transition obligation | — |
| | — |
| | — |
| Total | $ | (225 | ) | | $ | (10 | ) | | $ | (76 | ) |
|
Related Tax Effects Allocated to Each Component of Other Comprehensive Income | The following table details the change in components of OCI for the year-ended December 31:
| | | | | | | | | | | | | | | | | | 2016 | | Securities Available for Sale | | Derivatives | | Post-Retirement Obligation | | Accumulated Other Comprehensive Income | | (dollars in thousands) | Balance at January 1 | $ | (2,956 | ) | | $ | 560 |
| | $ | 10 |
| | $ | (2,386 | ) | Other comprehensive loss before reclassification adjustment | (4,098 | ) | | (311 | ) | | | | (4,409 | ) | Amounts reclassified from accumulated other comprehensive income (loss) | (401 | ) | | (46 | ) | | | | (447 | ) | Net gain | | | | | 215 |
| | 215 |
| Net other comprehensive loss during the period | (4,499 | ) | | (357 | ) | | 215 |
| | (4,641 | ) | Balance at December 31 | $ | (7,455 | ) | | $ | 203 |
| | $ | 225 |
| | $ | (7,027 | ) | | | | | | | | | | 2015 | | Securities Available for Sale | | Derivatives | | Post-Retirement Obligation | | Accumulated Other Comprehensive Income | | (dollars in thousands) | Balance at January 1 | $ | (4,875 | ) | | $ | 300 |
| | $ | 76 |
| | $ | (4,499 | ) | Other comprehensive income before reclassification adjustment | 1,820 |
| | 292 |
| | | | 2,112 |
| Amounts reclassified from accumulated other comprehensive income (loss) | 99 |
| | (32 | ) | | | | 67 |
| Net gain | | | | | (66 | ) | | (66 | ) | Net other comprehensive income during the period | 1,919 |
| | 260 |
| | (66 | ) | | 2,113 |
| Balance at December 31 | $ | (2,956 | ) | | $ | 560 |
| | $ | 10 |
| | $ | (2,386 | ) | | | | | | | | | | 2014 | | Securities Available for Sale | | Derivatives | | Post-Retirement Obligation | | Accumulated Other Comprehensive Income | | (dollars in thousands) | Balance at January 1 | $ | (20,868 | ) | | $ | — |
| | $ | 280 |
| | $ | (20,588 | ) | Other comprehensive income before reclassification adjustment | 16,350 |
| | 307 |
| | | | 16,657 |
| Amounts reclassified from accumulated other comprehensive income (loss) | (357 | ) | | (7 | ) | | | | (364 | ) | Net gain | | | | | (204 | ) | | (204 | ) | Net other comprehensive income during the period | 15,993 |
| | 300 |
| | (204 | ) | | 16,089 |
| Balance at December 31 | $ | (4,875 | ) | | $ | 300 |
| | $ | 76 |
| | $ | (4,499 | ) |
|