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Accumulated Other Comprehensive Income (Tables) | 6 Months Ended
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Jun. 30, 2023
Accumulated Other Comprehensive Income |
Schedule of Accumulated Other Comprehensive Income | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Unrealized | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | gains and | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | (Losses) on available- | ​ | 2023
​ | ​ | for-sale | ​ | Retirement | ​ | ​ | ​
(Dollar amounts in thousands) |  | Securities |  | plans |  | Total
Beginning balance, April 1, | ​ | $ | (114,658) | ​ | $ | (10,931) | ​ | $ | (125,589)
Change in other comprehensive income (loss) before reclassification | ​ |  | (15,808) | ​ |  | — | ​ |  | (15,808)
Amounts reclassified from accumulated other comprehensive income | ​ |  | — | ​ |  | 147 | ​ |  | 147
Net current period other comprehensive income (loss) | ​ |  | (15,808) | ​ |  | 147 | ​ |  | (15,661)
Ending balance, June 30, | ​ | $ | (130,466) | ​ | $ | (10,784) | ​ | $ | (141,250)
​ ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Unrealized | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | gains and | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | (Losses) on available- | ​ | 2023
​ | ​ | for-sale | ​ | Retirement | ​ | ​ | ​
(Dollar amounts in thousands) |  | Securities |  | plans |  | Total
Beginning balance, January 1, | ​ | $ | (128,896) | ​ | $ | (11,078) | ​ | $ | (139,974)
Change in other comprehensive income (loss) before reclassification | ​ |  | (1,570) | ​ |  | — | ​ |  | (1,570)
Amounts reclassified from accumulated other comprehensive income | ​ |  | — | ​ |  | 294 | ​ |  | 294
Net current period other comprehensive income (loss) | ​ |  | (1,570) | ​ |  | 294 | ​ |  | (1,276)
Ending balance, June 30, | ​ | $ | (130,466) | ​ | $ | (10,784) | ​ | $ | (141,250)
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Unrealized | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | gains and | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | (Losses) on available- | ​ | 2022
​ | ​ | for-sale | ​ | Retirement | ​ |  | ​
(Dollar amounts in thousands) |  | Securities |  | plans |  | Total
Beginning balance, April 1, | ​ | $ | (53,240) | ​ | $ | (17,785) | ​ | $ | (71,025)
Change in other comprehensive income (loss) before reclassification | ​ |  | (55,919) | ​ |  | — | ​ |  | (55,919)
Amounts reclassified from accumulated other comprehensive income | ​ |  | — | ​ |  | 314 | ​ |  | 314
Net current period other comprehensive income (loss) | ​ |  | (55,919) | ​ |  | 314 | ​ |  | (55,605)
Ending balance, June 30, | ​ | $ | (109,159) | ​ | $ | (17,471) | ​ | $ | (126,630)
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Unrealized | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | gains and | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | (Losses) on available- | ​ | 2022
​ | ​ | for-sale | ​ | Retirement | ​ |  | ​
(Dollar amounts in thousands) |  | Securities |  | plans |  | Total
Beginning balance, January 1, | ​ | $ | 15,674 | ​ | $ | (18,100) | ​ | $ | (2,426)
Change in other comprehensive income (loss) before reclassification | ​ |  | (124,829) | ​ |  | — | ​ |  | (124,829)
Amounts reclassified from accumulated other comprehensive income | ​ |  | (4) | ​ |  | 629 | ​ |  | 625
Net current period other comprehensive income (loss) | ​ |  | (124,833) | ​ |  | 629 | ​ |  | (124,204)
Ending balance, June 30, | ​ | $ | (109,159) | ​ | $ | (17,471) | ​ | $ | (126,630)
Schedule Of Accumulated Other Comprehensive Income Loss Other Than Temporary Impairment | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Balance at | ​ | Current Period | ​ | Balance at
(Dollar amounts in thousands) |  | 4/1/2023 |  | Change |  | 6/30/2023
Unrealized gains (losses) on securities available-for-sale without other than temporary impairment | ​ | $ | (116,844) | ​ | $ | (15,827) | ​ | $ | (132,671)
Unrealized gains (losses) on securities available-for-sale with other than temporary impairment | ​ |  | 2,186 | ​ |  | 19 | ​ |  | 2,205
Total unrealized loss on securities available-for-sale | ​ | $ | (114,658) | ​ | $ | (15,808) | ​ | $ | (130,466)
Unrealized gain (loss) on retirement plans | ​ |  | (10,931) | ​ |  | 147 | ​ |  | (10,784)
TOTAL | ​ | $ | (125,589) | ​ | $ | (15,661) | ​ | $ | (141,250)
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Balance at | ​ | Current Period | ​ | Balance at
(Dollar amounts in thousands) |  | 1/1/2023 |  | Change |  | 6/30/2023
Unrealized gains (losses) on securities available-for-sale without other than temporary impairment | ​ | $ | (131,135) | ​ | $ | (1,536) | ​ | $ | (132,671)
Unrealized gains (losses) on securities available-for-sale with other than temporary impairment | ​ |  | 2,239 | ​ |  | (34) | ​ |  | 2,205
Total unrealized gain (loss) on securities available-for-sale | ​ | $ | (128,896) | ​ | $ | (1,570) | ​ | $ | (130,466)
Unrealized gain (loss) on retirement plans | ​ |  | (11,078) | ​ |  | 294 | ​ |  | (10,784)
TOTAL | ​ | $ | (139,974) | ​ | $ | (1,276) | ​ | $ | (141,250)
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Balance at | ​ | Current Period | ​ | Balance at
(Dollar amounts in thousands) |  | 4/1/2022 |  | Change |  | 6/30/2022
Unrealized gains (losses) on securities available-for-sale without other than temporary impairment | ​ | $ | (55,888) | ​ | $ | (55,586) | ​ | $ | (111,474)
Unrealized gains (losses) on securities available-for-sale with other than temporary impairment | ​ |  | 2,648 | ​ |  | (333) | ​ |  | 2,315
Total unrealized gain (loss) on securities available-for-sale | ​ | $ | (53,240) | ​ | $ | (55,919) | ​ | $ | (109,159)
Unrealized loss on retirement plans | ​ |  | (17,785) | ​ |  | 314 | ​ |  | (17,471)
TOTAL | ​ | $ | (71,025) | ​ | $ | (55,605) | ​ | $ | (126,630)
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Balance at | ​ | Current Period | ​ | Balance at
(Dollar amounts in thousands) |  | 1/1/2022 |  | Change |  | 6/30/2022
Unrealized gains (losses) on securities available-for-sale without other than temporary impairment | ​ | $ | 13,155 | ​ | $ | (124,629) | ​ | $ | (111,474)
Unrealized gains (losses) on securities available-for-sale with other than temporary impairment | ​ |  | 2,519 | ​ |  | (204) | ​ |  | 2,315
Total unrealized income (loss) on securities available-for-sale | ​ | $ | 15,674 | ​ | $ | (124,833) | ​ | $ | (109,159)
Unrealized gain (loss) on retirement plans | ​ |  | (18,100) | ​ |  | 629 | ​ |  | (17,471)
TOTAL | ​ | $ | (2,426) | ​ | $ | (124,204) | ​ | $ | (126,630)
Accumulated Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Balance at | ​ | Current Period | ​ | Balance at
(Dollar amounts in thousands) |  | 1/1/2022 |  | Change |  | 6/30/2022
Unrealized gains (losses) on securities available-for-sale without other than temporary impairment | ​ | $ | 13,155 | ​ | $ | (124,629) | ​ | $ | (111,474)
Unrealized gains (losses) on securities available-for-sale with other than temporary impairment | ​ |  | 2,519 | ​ |  | (204) | ​ |  | 2,315
Total unrealized income (loss) on securities available-for-sale | ​ | $ | 15,674 | ​ | $ | (124,833) | ​ | $ | (109,159)
Unrealized gain (loss) on retirement plans | ​ |  | (18,100) | ​ |  | 629 | ​ |  | (17,471)
TOTAL | ​ | $ | (2,426) | ​ | $ | (124,204) | ​ | $ | (126,630)

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