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Accumulated Other Comprehensive Income (Tables) | 3 Months Ended
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Mar. 31, 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, January 1, | ​ | $ | (127,807) | ​ | $ | (4,478) | ​ | $ | (132,285)
Change in other comprehensive income (loss) before reclassification | ​ |  | 11,100 | ​ |  | — | ​ |  | 11,100
Amounts reclassified from accumulated other comprehensive income | ​ |  | — | ​ |  | 3 | ​ |  | 3
Net current period other comprehensive income (loss) | ​ |  | 11,100 | ​ |  | 3 | ​ |  | 11,103
Ending balance, March 31, | ​ | $ | (116,707) | ​ | $ | (4,475) | ​ | $ | (121,182)
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | 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 | ​ |  | (11,096) | ​ |  | — | ​ |  | (11,096)
Amounts reclassified from accumulated other comprehensive income | ​ |  | — | ​ |  | 73 | ​ |  | 73
Net current period other comprehensive income (loss) | ​ |  | (11,096) | ​ |  | 73 | ​ |  | (11,023)
Ending balance, March 31, | ​ | $ | (129,096) | ​ | $ | (9,014) | ​ | $ | (138,110)
Schedule Of Accumulated Other Comprehensive Income Loss Other Than Temporary Impairment | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Balance at | ​ | Current Period | ​ | Balance at
(Dollar amounts in thousands) |  | 1/1/2025 |  | Change |  | 3/31/2025
Unrealized gains (losses) on securities available-for-sale without other than temporary impairment | ​ | $ | (129,979) | ​ | $ | 11,096 | ​ | $ | (118,883)
Unrealized gains (losses) on securities available-for-sale with other than temporary impairment | ​ |  | 2,172 | ​ |  | 4 | ​ |  | 2,176
Total unrealized gain (loss) on securities available-for-sale | ​ | $ | (127,807) | ​ | $ | 11,100 | ​ | $ | (116,707)
Unrealized gain (loss) on retirement plans | ​ |  | (4,478) | ​ |  | 3 | ​ |  | (4,475)
TOTAL | ​ | $ | (132,285) | ​ | $ | 11,103 | ​ | $ | (121,182)
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Balance at | ​ | Current Period | ​ | Balance at
(Dollar amounts in thousands) |  | 1/1/2024 |  | Change |  | 3/31/2024
Unrealized gains (losses) on securities available-for-sale without other than temporary impairment | ​ | $ | (120,252) | ​ | $ | (11,010) | ​ | $ | (131,262)
Unrealized gains (losses) on securities available-for-sale with other than temporary impairment | ​ |  | 2,252 | ​ |  | (86) | ​ |  | 2,166
Total unrealized income (loss) on securities available-for-sale | ​ | $ | (118,000) | ​ | $ | (11,096) | ​ | $ | (129,096)
Unrealized gain (loss) on retirement plans | ​ |  | (9,087) | ​ |  | 73 | ​ |  | (9,014)
TOTAL | ​ | $ | (127,087) | ​ | $ | (11,023) | ​ | $ | (138,110)
Accumulated Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Three Months Ended March 31, 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 | ​ | $ | — |  | ​ | Net securities gains (losses)
on available-for-sale | ​ |  | — |  | ​ | Income tax expense
securities | ​ | $ | — |  | ​ | Net of tax
​ | ​ | ​ | ​ | ​ | ​ | ​
Amortization of | ​ | $ | (4) | (a) | ​ | Salary and benefits
retirement plan items | ​ |  | 1 |  | ​ | Income tax expense
​ | ​ | $ | (3) |  | ​ | Net of tax
Total reclassifications for the period | ​ | $ | (3) |  | ​ | Net of tax
| (a) | Included in the computation of net periodic benefit cost. (see Footnote 8 for additional details).
​ ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended March 31, 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 | ​ | $ | (97) | (a) | ​ | Salary and benefits
retirement plan items | ​ |  | 24 |  | ​ | Income tax expense
​ | ​ | $ | (73) |  | ​ | Net of tax
Total reclassifications for the period | ​ | $ | (73) |  | ​ | Net of tax
| (a) | Included in the computation of net periodic benefit cost. (see Footnote 8 for additional details).
​

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