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Accumulated Other Comprehensive Income (Tables) | 6 Months Ended
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Jun. 30, 2025
Accumulated Other Comprehensive Income |
Schedule of Accumulated Other Comprehensive Income | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Unrealized | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | gains and | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | (Losses) on available- | ​ | 2025
​ | ​ | for-sale | ​ | Retirement | ​ | ​ | ​
(Dollar amounts in thousands) |  | Securities |  | plans |  | Total
Beginning balance, April 1, | ​ | $ | (116,707) | ​ | $ | (4,475) | ​ | $ | (121,182)
Change in other comprehensive income (loss) before reclassification | ​ |  | 2,944 | ​ |  | — | ​ |  | 2,944
Amounts reclassified from accumulated other comprehensive income | ​ |  | 2 | ​ |  | 2 | ​ |  | 4
Net current period other comprehensive income (loss) | ​ |  | 2,946 | ​ |  | 2 | ​ |  | 2,948
Ending balance, June 30, | ​ | $ | (113,761) | ​ | $ | (4,473) | ​ | $ | (118,234)
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Unrealized | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | gains and | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | (Losses) on available- | ​ | 2025
​ | ​ | for-sale | ​ | Retirement | ​ | ​ | ​
(Dollar amounts in thousands) |  | Securities |  | plans |  | Total
Beginning balance, January 1, | ​ | $ | (127,807) | ​ | $ | (4,478) | ​ | $ | (132,285)
Change in other comprehensive income (loss) before reclassification | ​ |  | 14,044 | ​ |  | — | ​ |  | 14,044
Amounts reclassified from accumulated other comprehensive income | ​ |  | 2 | ​ |  | 5 | ​ |  | 7
Net current period other comprehensive income (loss) | ​ |  | 14,046 | ​ |  | 5 | ​ |  | 14,051
Ending balance, June 30, | ​ | $ | (113,761) | ​ | $ | (4,473) | ​ | $ | (118,234)
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Unrealized | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | gains and | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | (Losses) on available- | ​ | 2024
​ | ​ | for-sale | ​ | Retirement | ​ |  | ​
(Dollar amounts in thousands) |  | Securities |  | plans |  | Total
Beginning balance, April 1, | ​ | $ | (129,096) | ​ | $ | (9,014) | ​ | $ | (138,110)
Change in other comprehensive income (loss) before reclassification | ​ |  | 3,535 | ​ |  | — | ​ |  | 3,535
Amounts reclassified from accumulated other comprehensive income | ​ |  | — | ​ |  | 74 | ​ |  | 74
Net current period other comprehensive income (loss) | ​ |  | 3,535 | ​ |  | 74 | ​ |  | 3,609
Ending balance, June 30, | ​ | $ | (125,561) | ​ | $ | (8,940) | ​ | $ | (134,501)
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Unrealized | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | gains and | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | (Losses) on available- | ​ | 2024
​ | ​ | for-sale | ​ | Retirement | ​ |  | ​
(Dollar amounts in thousands) |  | Securities |  | plans |  | Total
Beginning balance, January 1, | ​ | $ | (118,000) | ​ | $ | (9,087) | ​ | $ | (127,087)
Change in other comprehensive income (loss) before reclassification | ​ |  | (7,561) | ​ |  | — | ​ |  | (7,561)
Amounts reclassified from accumulated other comprehensive income | ​ |  | — | ​ |  | 147 | ​ |  | 147
Net current period other comprehensive income (loss) | ​ |  | (7,561) | ​ |  | 147 | ​ |  | (7,414)
Ending balance, June 30, | ​ | $ | (125,561) | ​ | $ | (8,940) | ​ | $ | (134,501)
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Balance at | ​ | Current Period | ​ | Balance at
(Dollar amounts in thousands) |  | 4/1/2025 |  | Change |  | 6/30/2025
Unrealized gains (losses) on securities available-for-sale without other than temporary impairment | ​ | $ | (118,883) | ​ | $ | 2,941 | ​ | $ | (115,942)
Unrealized gains (losses) on securities available-for-sale with other than temporary impairment | ​ |  | 2,176 | ​ |  | 5 | ​ |  | 2,181
Total unrealized loss on securities available-for-sale | ​ | $ | (116,707) | ​ | $ | 2,946 | ​ | $ | (113,761)
Unrealized gain (loss) on retirement plans | ​ |  | (4,475) | ​ |  | 2 | ​ |  | (4,473)
TOTAL | ​ | $ | (121,182) | ​ | $ | 2,948 | ​ | $ | (118,234)
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Balance at | ​ | Current Period | ​ | Balance at
(Dollar amounts in thousands) |  | 1/1/2025 |  | Change |  | 6/30/2025
Unrealized gains (losses) on securities available-for-sale without other than temporary impairment | ​ | $ | (129,979) | ​ | $ | 14,037 | ​ | $ | (115,942)
Unrealized gains (losses) on securities available-for-sale with other than temporary impairment | ​ |  | 2,172 | ​ |  | 9 | ​ |  | 2,181
Total unrealized gain (loss) on securities available-for-sale | ​ | $ | (127,807) | ​ | $ | 14,046 | ​ | $ | (113,761)
Unrealized gain (loss) on retirement plans | ​ |  | (4,478) | ​ |  | 5 | ​ |  | (4,473)
TOTAL | ​ | $ | (132,285) | ​ | $ | 14,051 | ​ | $ | (118,234)
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Balance at | ​ | Current Period | ​ | Balance at
(Dollar amounts in thousands) |  | 4/1/2024 |  | Change |  | 6/30/2024
Unrealized gains (losses) on securities available-for-sale without other than temporary impairment | ​ | $ | (131,262) | ​ | $ | 3,532 | ​ | $ | (127,730)
Unrealized gains (losses) on securities available-for-sale with other than temporary impairment | ​ |  | 2,166 | ​ |  | 3 | ​ |  | 2,169
Total unrealized gain (loss) on securities available-for-sale | ​ | $ | (129,096) | ​ | $ | 3,535 | ​ | $ | (125,561)
Unrealized loss on retirement plans | ​ |  | (9,014) | ​ |  | 74 | ​ |  | (8,940)
TOTAL | ​ | $ | (138,110) | ​ | $ | 3,609 | ​ | $ | (134,501)
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Balance at | ​ | Current Period | ​ | Balance at
(Dollar amounts in thousands) |  | 1/1/2024 |  | Change |  | 6/30/2024
Unrealized gains (losses) on securities available-for-sale without other than temporary impairment | ​ | $ | (120,252) | ​ | $ | (7,478) | ​ | $ | (127,730)
Unrealized gains (losses) on securities available-for-sale with other than temporary impairment | ​ |  | 2,252 | ​ |  | (83) | ​ |  | 2,169
Total unrealized income (loss) on securities available-for-sale | ​ | $ | (118,000) | ​ | $ | (7,561) | ​ | $ | (125,561)
Unrealized gain (loss) on retirement plans | ​ |  | (9,087) | ​ |  | 147 | ​ |  | (8,940)
TOTAL | ​ | $ | (127,087) | ​ | $ | (7,414) | ​ | $ | (134,501)
​
Reclassification out of Accumulated Other Comprehensive Income | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Three Months Ended June 30, 2025 |  | ​ |
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 | ​ | $ | (3) |  | ​ | Net securities gains (losses)
on available-for-sale | ​ |  | 1 |  | ​ | Income tax expense
securities | ​ | $ | (2) |  | ​ | Net of tax
​ | ​ | ​ | ​ | ​ | ​ | ​
Amortization of | ​ | $ | (3) | (a) | ​ | Salary and benefits
retirement plan items | ​ |  | 1 |  | ​ | Income tax expense
​ | ​ | $ | (2) |  | ​ | Net of tax
Total reclassifications for the period | ​ | $ | (4) |  | ​ | Net of tax
| (a) | Included in the computation of net periodic benefit cost. (see Footnote 8 for additional details).
​ ​ ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Six Months Ended June 30, 2025 |  | ​ |
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 | ​ | $ | (3) |  | ​ | Net securities gains (losses)
on available-for-sale | ​ |  | 1 |  | ​ | Income tax expense
securities | ​ | $ | (2) |  | ​ | Net of tax
​ | ​ | ​ | ​ | ​ | ​ | ​
Amortization of | ​ | $ | (7) | (a) | ​ | Salary and benefits
retirement plan items | ​ |  | 2 |  | ​ | Income tax expense
​ | ​ | $ | (5) |  | ​ | Net of tax
Total reclassifications for the period | ​ | $ | (7) |  | ​ | Net of tax
| (a) | Included in the computation of net periodic benefit cost. (see Footnote 8 for additional details).
​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended June 30, 2024 | ​ | ​ | ​
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 | ​ | $ | — |  | ​ | Net securities gains (losses)
on available-for-sale | ​ |  | — |  | ​ | Income tax expense
securities | ​ | $ | — |  | ​ | Net of tax
​ | ​ | ​ | ​ | ​ | ​ | ​
Amortization of | ​ | $ | (195) | (a) | ​ | Salary and benefits
retirement plan items | ​ |  | 48 |  | ​ | Income tax expense
​ | ​ | $ | (147) |  | ​ | Net of tax
Total reclassifications for the period | ​ | $ | (147) |  | ​ | Net of tax
| (a) | Included in the computation of net periodic benefit cost. (see Footnote 8 for additional details).
​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Six Months Ended June 30, 2024 | ​ | ​ | ​
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 | ​ | $ | — |  | ​ | Net securities gains (losses)
on available-for-sale | ​ |  | — |  | ​ | Income tax expense
securities | ​ | $ | — |  | ​ | Net of tax
​ | ​ | ​ | ​ | ​ | ​ | ​
Amortization of | ​ | $ | (98) | (a) | ​ | Salary and benefits
retirement plan items | ​ |  | 24 |  | ​ | Income tax expense
​ | ​ | $ | (74) |  | ​ | Net of tax
Total reclassifications for the period | ​ | $ | (74) |  | ​ | Net of tax
| (a) | Included in the computation of net periodic benefit cost. (see Footnote 8 for additional details).

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