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OTHER COMPREHENSIVE LOSS (Tables) | 12 Months Ended
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Dec. 31, 2017
Equity [Abstract] |
Schedule of Other Comprehensive Loss | The following table presents a reconciliation of the changes in the components of other comprehensive income (loss) for the dates indicated, including the amount of income tax (expense) benefit allocated to each component of other comprehensive income (loss):
| December 31, 2017
| Pre Tax Amount |  | Tax (Expense) Benefit |  | After Tax Amount
| (Dollars in thousands)
Change in fair value of securities available for sale | $ | (996 | ) |  | $ | 321 |  |  | $ | (675 | )
Less: net security gains reclassified into other noninterest income (expense) | 3 |  |  | (1 | ) |  | 2 |
Net change in fair value of securities available for sale | (999 | ) |  | 322 |  |  | (677 | )
Change in fair value of cash flow hedges | 307 |  |  | (125 | ) |  | 182 |
Less: net cash flow hedge losses reclassified into interest on borrowings expense (1) | (441 | ) |  | 180 |  |  | (261 | )
Net change in fair value of cash flow hedges | 748 |  |  | (305 | ) |  | 443 |
Net unamortized loss related to defined benefit pension and other postretirement adjustments arising during the period | (995 | ) |  | 407 |  |  | (588 | )
Amortization of net actuarial losses | 278 |  |  | (113 | ) |  | 165 |
Amortization of net prior service cost | 276 |  |  | (113 | ) |  | 163 |
Net change in other comprehensive income for defined benefit postretirement plans (2) | (441 | ) |  | 181 |  |  | (260 | )
Total other comprehensive loss | $ | (692 | ) |  | $ | 198 |  |  | $ | (494 | )
| Year Ended December 31, 2016
| Pre Tax Amount |  | Tax (Expense) Benefit |  | After Tax Amount
| (Dollars in thousands)
Change in fair value of securities available for sale | $ | (1,858 | ) |  | $ | 710 |  |  | $ | (1,148 | )
Less: net security losses reclassified into other noninterest income (expense) | (26 | ) |  | 11 |  |  | (15 | )
Net change in fair value of securities available for sale | (1,832 | ) |  | 699 |  |  | (1,133 | )
Change in fair value of cash flow hedges | 1,133 |  |  | (453 | ) |  | 680 |
Less: net cash flow hedge losses reclassified into interest on borrowings expense (1) | (2,520 | ) |  | 1,030 |  |  | (1,490 | )
Net change in fair value of cash flow hedges | 3,653 |  |  | (1,483 | ) |  | 2,170 |
Net unamortized loss related to defined benefit pension and other postretirement adjustments arising during the period | (383 | ) |  | 157 |  |  | (226 | )
Amortization of net actuarial losses | 238 |  |  | (97 | ) |  | 141 |
Amortization of net prior service cost | 276 |  |  | (113 | ) |  | 163 |
Net change in other comprehensive income for defined benefit postretirement plans (2) | 131 |  |  | (53 | ) |  | 78 |
Total other comprehensive income | $ | 1,952 |  |  | $ | (837 | ) |  | $ | 1,115 |
| Year Ended December 31, 2015
| Pre Tax Amount |  | Tax (Expense) Benefit |  | After Tax Amount
| (Dollars in thousands)
Change in fair value of securities available for sale | $ | (3,757 | ) |  | $ | 1,434 |  |  | $ | (2,323 | )
Less: net security losses reclassified into other noninterest income (expense) | (405 | ) |  | 165 |  |  | (240 | )
Net change in fair value of securities available for sale | (3,352 | ) |  | 1,269 |  |  | (2,083 | )
Change in fair value of cash flow hedges | (776 | ) |  | 299 |  |  | (477 | )
Less: Net cash flow hedge losses reclassified into interest on borrowings expense (1) | (2,828 | ) |  | 1,152 |  |  | (1,676 | )
Net change in fair value of cash flow hedges | 2,052 |  |  | (853 | ) |  | 1,199 |
Net unamortized gain related to defined benefit pension and other postretirement adjustments arising during the period | 438 |  |  | (193 | ) |  | 245 |
Amortization of net actuarial losses | 243 |  |  | (99 | ) |  | 144 |
Amortization of net prior service cost | 294 |  |  | (119 | ) |  | 175 |
Net change in other comprehensive income for defined benefit postretirement plans (2) | 975 |  |  | (411 | ) |  | 564 |
Total other comprehensive loss | $ | (325 | ) |  | $ | 5 |  |  | $ | (320 | )
(1) | Includes the amortization of the remaining balance of a realized but unrecognized gain, net of tax, from the termination of interest rate swaps in 2009. The original gain of $1.4 million, net of tax, will be recognized in earnings through December 2018, the original maturity date of the swap. The balance of this gain had amortized to $137,000, $281,000, and $427,000 at December 31, 2017, 2016, and 2015, respectively.
(2) | The amortization of prior service costs is included in the computation of net periodic pension costs as disclosed in Note 15 - Employee Benefit Plans.
Schedule of Accumulated Other Comprehensive Income (Loss), Net of Tax | Information on the Company's accumulated other comprehensive loss, net of tax, is comprised of the following components as of the periods indicated:
| Unrealized Gain (Loss) on Securities |  | Unrealized Gain (Loss) on Cash Flow Hedge |  | Deferred Gain on Hedge Transactions |  | Defined Benefit Postretirement Plans |  | Accumulated Other Comprehensive Income (Loss)
| (Dollars in Thousands)
Beginning balance: January 1, 2015 | $ | 3,389 |  |  | $ | (3,298 | ) |  | $ | 571 |  |  | $ | (2,794 | ) |  | $ | (2,132 | )
Net change in other comprehensive income (loss) | (2,083 | ) |  | 1,343 |  |  | (144 | ) |  | 564 |  |  | (320 | )
Ending balance: December 31, 2015 | $ | 1,306 |  |  | $ | (1,955 | ) |  | $ | 427 |  |  | $ | (2,230 | ) |  | $ | (2,452 | )
Net change in other comprehensive income (loss) | (1,133 | ) |  | 2,316 |  |  | (146 | ) |  | 78 |  |  | 1,115 |
Ending balance: December 31, 2016 | $ | 173 |  |  | $ | 361 |  |  | $ | 281 |  |  | $ | (2,152 | ) |  | $ | (1,337 | )
Net change in other comprehensive income (loss) | (677 | ) |  | 587 |  |  | (144 | ) |  | (260 | ) |  | (494 | )
Ending balance: December 31, 2017 | $ | (504 | ) |  | $ | 948 |  |  | $ | 137 |  |  | $ | (2,412 | ) |  | $ | (1,831 | )

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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=84228862&loc=d3e526-108580 + Details
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