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OTHER COMPREHENSIVE INCOME (LOSS): (Tables) | 12 Months Ended
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Dec. 31, 2020
Equity [Abstract] |
Schedule of Accumulated Other Comprehensive Income (Loss) | The following table summarizes the changes, net of tax within each classification of accumulated other comprehensive income for the years ended December 31, 2020 and 2019.
|  | Unrealized |  |  |  |
|  | gains and |  | 2020
|  | Losses on available- for-sale |  | Retirement |  |
(Dollar amounts in thousands) |  | Securities |  | plans |  | Total
Beginning balance, January 1 |  | $ | 14,893 |  |  | $ | (22,394) |  |  | $ | (7,501) |
Change in other comprehensive income before reclassification |  | 19,444 |  |  | (3,479) |  |  | 15,965 |
Amounts reclassified from accumulated other comprehensive income |  | (175) |  |  | 1,475 |  |  | 1,300 |
Net current period other comprehensive income (loss) |  | 19,269 |  |  | (2,004) |  |  | 17,265 |
Ending balance, December 31 |  | $ | 34,162 |  |  | $ | (24,398) |  |  | $ | 9,764 |
|  | Unrealized |  |  |  |
|  | gains and |  | 2019
|  | Losses on available- for-sale |  | Retirement |  |
(Dollar amounts in thousands) |  | Securities |  | plans |  | Total
Beginning balance, January 1 |  | $ | (6,105) |  |  | $ | (17,349) |  |  | $ | (23,454) |
Change in other comprehensive income before reclassification |  | 21,031 |  |  | (6,213) |  |  | 14,818 |
Amounts reclassified from accumulated other comprehensive income |  | (33) |  |  | 1,168 |  |  | 1,135 |
Net current period other comprehensive income (loss) |  | 20,998 |  |  | (5,045) |  |  | 15,953 |
Ending balance, December 31 |  | $ | 14,893 |  |  | $ | (22,394) |  |  | $ | (7,501) |
|  | Balance at |  | Current Period |  | Balance at
(Dollar amounts in thousands) |  | 1/1/2020 |  | Change |  | 12/31/2020
Unrealized gains (losses) on securities available-for-sale |  |  |  |  |  |
without other than temporary impairment |  | $ | 12,178 |  |  | $ | 19,632 |  |  | $ | 31,810 |
Unrealized gains (losses) on securities available-for-sale |  |  |  |  |  |
with other than temporary impairment |  | 2,715 |  |  | (363) |  |  | 2,352 |
Total unrealized gain (loss) on securities available-for-sale |  | $ | 14,893 |  |  | $ | 19,269 |  |  | $ | 34,162 |
Unrealized loss on retirement plans |  | (22,394) |  |  | (2,004) |  |  | (24,398) |
TOTAL |  | $ | (7,501) |  |  | $ | 17,265 |  |  | $ | 9,764 |
|  | Balance at |  | Current Period |  | Balance at
(Dollar amounts in thousands) |  | 1/1/2019 |  | Change |  | 12/31/2019
Unrealized gains (losses) on securities available-for-sale |  |  |  |  |  |
without other than temporary impairment |  | $ | (8,446) |  |  | $ | 20,624 |  |  | $ | 12,178 |
Unrealized gains (losses) on securities available-for-sale |  |  |  |  |  |
with other than temporary impairment |  | 2,341 |  |  | 374 |  |  | 2,715 |
Total unrealized gain (loss) on securities available-for-sale |  | $ | (6,105) |  |  | $ | 20,998 |  |  | $ | 14,893 |
Unrealized loss on retirement plans |  | (17,349) |  |  | (5,045) |  |  | (22,394) |
TOTAL |  | $ | (23,454) |  |  | $ | 15,953 |  |  | $ | (7,501) |
Reclassification out of Accumulated Other Comprehensive Income |
|  | Balance at December 31, 2020 |  |
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 |  | $ | 233 |  |  | Net securities gains (losses)
on available-for-sale |  | (58) |  |  | Income tax expense
securities |  | $ | 175 |  |  | Net of tax
Amortization of |  | $ | (1,967) |  |  | (a)
retirement plan items |  | 492 |  |  | Income tax expense
|  | $ | (1,475) |  |  | Net of tax
Total reclassifications for the period |  | $ | (1,300) |  |  | Net of tax
(a) Included in the computation of net periodic benefit cost which is included in salaries and benefits. (see Footnote 16 for additional details).
|  | Balance at December 31, 2019 |  |
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 |  | $ | 44 |  |  | Net securities gains (losses)
on available-for-sale |  | (11) |  |  | Income tax expense
securities |  | $ | 33 |  |  | Net of tax
Amortization of |  | $ | (1,558) |  |  | (a)
retirement plan items |  | 390 |  |  | Income tax expense
|  | $ | (1,168) |  |  | Net of tax
Total reclassifications for the period |  | $ | (1,135) |  |  | Net of tax
(a) Included in the computation of net periodic benefit cost which is included in salaries and benefits. (see Footnote 16 for additional details).
|  | Balance at December 31, 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 |  | $ | (1,447) |  |  | (a)
retirement plan items |  | 362 |  |  | Income tax expense
|  | $ | (1,085) |  |  | Net of tax
Total reclassifications for the period |  | $ | (1,083) |  |  | Net of tax
(a) Included in the computation of net periodic benefit cost which is included in salaries and benefits. (see Footnote 16 for additional details).

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