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Accumulated Other Comprehensive Income | 6 Months Ended
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Jun. 30, 2018
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] |
Accumulated Other Comprehensive Income | Accumulated Other Comprehensive Income The following tables summarize the changes, net of tax, within each classification of accumulated other comprehensive income/(loss) for the three and six months ended June 30, 2018 and 2017.
|  | Unrealized |  |  |  |
|  | gains and |  | 2018
|  | (Losses) on available- for-sale |  | Retirement |  |
(Dollar amounts in thousands) |  | Securities |  | plans |  | Total
Beginning balance, April 1, |  | $ | (4,943 | ) |  | $ | (19,545 | ) |  | $ | (24,488 | )
Change in other comprehensive income (loss) before reclassification |  | (4,680 | ) |  | — |  |  | (4,680 | )
Amounts reclassified from accumulated other comprehensive income |  | (2 | ) |  | 281 |  |  | 279 |
ASU 2018-02 adjustment |  | — |  |  | — |  |  | — |
Net current period other comprehensive income (loss) |  | (4,682 | ) |  | 281 |  |  | (4,401 | )
Ending balance, June 30, |  | $ | (9,625 | ) |  | $ | (19,264 | ) |  | $ | (28,889 | )
|  | Unrealized |  |  |  |
|  | gains and |  | 2018
|  | (Losses) on available- for-sale |  | Retirement |  |
(Dollar amounts in thousands) |  | Securities |  | plans |  | Total
Beginning balance, January 1, |  | $ | 2,258 |  |  | $ | (16,962 | ) |  | $ | (14,704 | )
Change in other comprehensive income (loss) before reclassification |  | (12,379 | ) |  | — |  |  | (12,379 | )
Amounts reclassified from accumulated other comprehensive income |  | (2 | ) |  | 562 |  |  | 560 |
ASU 2018-02 adjustment |  | 498 |  |  | (2,864 | ) |  | (2,366 | )
Net current period other comprehensive loss |  | (11,883 | ) |  | (2,302 | ) |  | (14,185 | )
Ending balance, June 30, |  | $ | (9,625 | ) |  | $ | (19,264 | ) |  | $ | (28,889 | )
|  | Unrealized |  |  |  |
|  | gains and |  | 2017
|  | (Losses) on available- for-sale |  | Retirement |  |
(Dollar amounts in thousands) |  | Securities |  | plans |  | Total
Beginning balance, April 1, |  | $ | 2,111 |  |  | $ | (12,904 | ) |  | $ | (10,793 | )
Change in other comprehensive income (loss) before reclassification |  | 5,055 |  |  | — |  |  | 5,055 |
Amounts reclassified from accumulated other comprehensive income |  | (10 | ) |  | 184 |  |  | 174 |
Net current period other comprehensive income |  | 5,045 |  |  | 184 |  |  | 5,229 |
Ending balance, June 30, |  | $ | 7,156 |  |  | $ | (12,720 | ) |  | $ | (5,564 | )
|  | Unrealized |  |  |  |
|  | gains and |  | 2017
|  | (Losses) on available- for-sale |  | Retirement |  |
(Dollar amounts in thousands) |  | Securities |  | plans |  | Total
Beginning balance, January 1, |  | $ | (1,077 | ) |  | $ | (13,087 | ) |  | $ | (14,164 | )
Change in other comprehensive income (loss) before reclassification |  | 8,244 |  |  | — |  |  | 8,244 |
Amounts reclassified from accumulated other comprehensive income |  | (11 | ) |  | 367 |  |  | 356 |
Net current period other comprehensive income |  | 8,233 |  |  | 367 |  |  | 8,600 |
Ending balance, June 30, |  | $ | 7,156 |  |  | $ | (12,720 | ) |  | $ | (5,564 | )
|  | Balance at |  | Current Period |  | Balance at
(Dollar amounts in thousands) |  | 4/1/2018 |  | Change |  | 6/30/2018
Unrealized gains (losses) on securities available-for-sale |  |  |  |  |  |
without other than temporary impairment |  | $ | (9,225 | ) |  | $ | (2,367 | ) |  | $ | (11,592 | )
Unrealized gains (losses) on securities available-for-sale |  |  |  |  |  |  |  |  |
with other than temporary impairment |  | 4,282 |  |  | (2,315 | ) |  | 1,967 |
Total unrealized loss on securities available-for-sale |  | $ | (4,943 | ) |  | $ | (4,682 | ) |  | $ | (9,625 | )
Unrealized loss on retirement plans |  | (19,545 | ) |  | 281 |  |  | (19,264 | )
TOTAL |  | $ | (24,488 | ) |  | $ | (4,401 | ) |  | $ | (28,889 | )
|  | Balance at |  | Current Period |  | Balance at
(Dollar amounts in thousands) |  | 1/1/2018 |  | Change |  | 6/30/2018
Unrealized gains (losses) on securities available-for-sale |  |  |  |  |  |
without other than temporary impairment |  | $ | (1,371 | ) |  | $ | (10,221 | ) |  | $ | (11,592 | )
Unrealized gains (losses) on securities available-for-sale |  |  |  |  |  |  |  |  |
with other than temporary impairment |  | 3,629 |  |  | (1,662 | ) |  | 1,967 |
Total unrealized loss on securities available-for-sale |  | $ | 2,258 |  |  | $ | (11,883 | ) |  | $ | (9,625 | )
Unrealized loss on retirement plans |  | (16,962 | ) |  | (2,302 | ) |  | (19,264 | )
TOTAL |  | $ | (14,704 | ) |  | $ | (14,185 | ) |  | $ | (28,889 | )
|  | Balance at |  | Current Period |  | Balance at
(Dollar amounts in thousands) |  | 4/1/2017 |  | Change |  | 6/30/2017
Unrealized gains (losses) on securities available-for-sale |  |  |  |  |  |  |  |  |
without other than temporary impairment |  | $ | 326 |  |  | $ | 4,803 |  |  | $ | 5,129 |
Unrealized gains (losses) on securities available-for-sale |  |  |  |  |  |  |  |  |
with other than temporary impairment |  | 1,785 |  |  | 242 |  |  | 2,027 |
Total unrealized loss on securities available-for-sale |  | $ | 2,111 |  |  | $ | 5,045 |  |  | $ | 7,156 |
Unrealized loss on retirement plans |  | (12,904 | ) |  | 184 |  |  | (12,720 | )
TOTAL |  | $ | (10,793 | ) |  | $ | 5,229 |  |  | $ | (5,564 | )
|  | Balance at |  | Current Period |  | Balance at
(Dollar amounts in thousands) |  | 1/1/2017 |  | Change |  | 6/30/2017
Unrealized gains (losses) on securities available-for-sale |  |  |  |  |  |  |  |  |
without other than temporary impairment |  | $ | (3,018 | ) |  | $ | 8,147 |  |  | $ | 5,129 |
Unrealized gains (losses) on securities available-for-sale |  |  |  |  |  |  |  |  |
with other than temporary impairment |  | 1,941 |  |  | 86 |  |  | 2,027 |
Total unrealized loss on securities available-for-sale |  | $ | (1,077 | ) |  | $ | 8,233 |  |  | $ | 7,156 |
Unrealized loss on retirement plans |  | (13,087 | ) |  | 367 |  |  | (12,720 | )
TOTAL |  | $ | (14,164 | ) |  | $ | 8,600 |  |  | $ | (5,564 | )
|  | Three Months Ended June 30, 2018 |  |
Details about accumulated |  | Amount reclassified from |  | Affected line item in
other comprehensive |  | accumulated other |  | the statement where
income components |  | comprehensive income |  | net income is presented
|  | (in thousands) |  |
Unrealized gains and losses |  | $ | 2 |  |  | Net securities gains (losses)
on available-for-sale |  | — |  |  | Income tax expense
securities |  | $ | 2 |  |  | Net of tax
Amortization of |  | $ | (362 | ) |  | (a) Salary and benefits
retirement plan items |  | 81 |  |  | Income tax expense
|  | $ | (281 | ) |  | Net of tax
Total reclassifications for the period |  | $ | (279 | ) |  | Net of tax
(a) Included in the computation of net periodic benefit cost. (see Footnote 6 for additional details).
|  | Six Months Ended June 30, 2018 |  |
Details about accumulated |  | Amount reclassified from |  | Affected line item in
other comprehensive |  | accumulated other |  | the statement where
income components |  | comprehensive income |  | net income is presented
|  | (in thousands) |  |
Unrealized gains and losses |  | $ | 2 |  |  | Net securities gains (losses)
on available-for-sale |  | — |  |  | Income tax expense
securities |  | $ | 2 |  |  | Net of tax
Amortization of |  | $ | (723 | ) |  | (a) Salary and benefits
retirement plan items |  | 161 |  |  | Income tax expense
|  | $ | (562 | ) |  | Net of tax
Total reclassifications for the period |  | $ | (560 | ) |  | Net of tax
(a) Included in the computation of net periodic benefit cost. (see Footnote 6 for additional details).
|  | Three Months Ended June 30, 2017 |  |
Details about accumulated |  | Amount reclassified from |  | Affected line item in
other comprehensive |  | accumulated other |  | the statement where
income components |  | comprehensive income |  | net income is presented
|  | (in thousands) |  |
Unrealized gains and losses |  | $ | 15 |  |  | Net securities gains (losses)
on available-for-sale |  | (5 | ) |  | Income tax expense
securities |  | $ | 10 |  |  | Net of tax
Amortization of |  | $ | (301 | ) |  | (a) Salary and benefits
retirement plan items |  | 117 |  |  | Income tax expense
|  | $ | (184 | ) |  | Net of tax
Total reclassifications for the period |  | $ | (174 | ) |  | Net of tax
(a) Included in the computation of net periodic benefit cost. (see Footnote 6 for additional details).
|  | Six Months Ended June 30, 2017 |  |
Details about accumulated |  | Amount reclassified from |  | Affected line item in
other comprehensive |  | accumulated other |  | the statement where
income components |  | comprehensive income |  | net income is presented
|  | (in thousands) |  |
Unrealized gains and losses |  | $ | 17 |  |  | Net securities gains (losses)
on available-for-sale |  | (6 | ) |  | Income tax expense
securities |  | $ | 11 |  |  | Net of tax
Amortization of |  | $ | (602 | ) |  | (a) Salary and benefits
retirement plan items |  | 235 |  |  | Income tax expense
|  | $ | (367 | ) |  | Net of tax
Total reclassifications for the period |  | $ | (356 | ) |  | Net of tax
(a) Included in the computation of net periodic benefit cost. (see Footnote 6 for additional details).

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- Definition The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -URI http://asc.fasb.org/topic&trid=2134417 + Details
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