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Accumulated Other Comprehensive Income (Tables) | 9 Months Ended
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Sep. 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, July 1, | ​ | $ | (130,466) | ​ | $ | (10,784) | ​ | $ | (141,250)
Change in other comprehensive income (loss) before reclassification | ​ |  | (34,934) | ​ |  | — | ​ |  | (34,934)
Amounts reclassified from accumulated other comprehensive income | ​ |  | — | ​ |  | 146 | ​ |  | 146
Net current period other comprehensive income (loss) | ​ |  | (34,934) | ​ |  | 146 | ​ |  | (34,788)
Ending balance, September 30, | ​ | $ | (165,400) | ​ | $ | (10,638) | ​ | $ | (176,038)
​ ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | 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 | ​ |  | (36,504) | ​ |  | — | ​ |  | (36,504)
Amounts reclassified from accumulated other comprehensive income | ​ |  | — | ​ |  | 440 | ​ |  | 440
Net current period other comprehensive income (loss) | ​ |  | (36,504) | ​ |  | 440 | ​ |  | (36,064)
Ending balance, September 30, | ​ | $ | (165,400) | ​ | $ | (10,638) | ​ | $ | (176,038)
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Unrealized | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | gains and | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | (Losses) on available- | ​ | 2022
​ | ​ | for-sale | ​ | Retirement | ​ |  | ​
(Dollar amounts in thousands) |  | Securities |  | plans |  | Total
Beginning balance, July 1, | ​ | $ | (109,159) | ​ | $ | (17,471) | ​ | $ | (126,630)
Change in other comprehensive income (loss) before reclassification | ​ |  | (41,060) | ​ |  | — | ​ |  | (41,060)
Amounts reclassified from accumulated other comprehensive income | ​ |  | — | ​ |  | 315 | ​ |  | 315
Net current period other comprehensive income (loss) | ​ |  | (41,060) | ​ |  | 315 | ​ |  | (40,745)
Ending balance, September 30, | ​ | $ | (150,219) | ​ | $ | (17,156) | ​ | $ | (167,375)
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | 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 | ​ |  | (165,889) | ​ |  | — | ​ |  | (165,889)
Amounts reclassified from accumulated other comprehensive income | ​ |  | (4) | ​ |  | 944 | ​ |  | 940
Net current period other comprehensive income (loss) | ​ |  | (165,893) | ​ |  | 944 | ​ |  | (164,949)
Ending balance, September 30, | ​ | $ | (150,219) | ​ | $ | (17,156) | ​ | $ | (167,375)
Schedule Of Accumulated Other Comprehensive Income Loss Other Than Temporary Impairment | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Balance at | ​ | Current Period | ​ | Balance at
(Dollar amounts in thousands) |  | 7/1/2023 |  | Change |  | 9/30/2023
Unrealized gains (losses) on securities available-for-sale without other than temporary impairment | ​ | $ | (132,671) | ​ | $ | (34,997) | ​ | $ | (167,668)
Unrealized gains (losses) on securities available-for-sale with other than temporary impairment | ​ |  | 2,205 | ​ |  | 63 | ​ |  | 2,268
Total unrealized loss on securities available-for-sale | ​ | $ | (130,466) | ​ | $ | (34,934) | ​ | $ | (165,400)
Unrealized gain (loss) on retirement plans | ​ |  | (10,784) | ​ |  | 146 | ​ |  | (10,638)
TOTAL | ​ | $ | (141,250) | ​ | $ | (34,788) | ​ | $ | (176,038)
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Balance at | ​ | Current Period | ​ | Balance at
(Dollar amounts in thousands) |  | 1/1/2023 |  | Change |  | 9/30/2023
Unrealized gains (losses) on securities available-for-sale without other than temporary impairment | ​ | $ | (131,135) | ​ | $ | (36,533) | ​ | $ | (167,668)
Unrealized gains (losses) on securities available-for-sale with other than temporary impairment | ​ |  | 2,239 | ​ |  | 29 | ​ |  | 2,268
Total unrealized gain (loss) on securities available-for-sale | ​ | $ | (128,896) | ​ | $ | (36,504) | ​ | $ | (165,400)
Unrealized gain (loss) on retirement plans | ​ |  | (11,078) | ​ |  | 440 | ​ |  | (10,638)
TOTAL | ​ | $ | (139,974) | ​ | $ | (36,064) | ​ | $ | (176,038)
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Balance at | ​ | Current Period | ​ | Balance at
(Dollar amounts in thousands) |  | 7/1/2022 |  | Change |  | 9/30/2022
Unrealized gains (losses) on securities available-for-sale without other than temporary impairment | ​ | $ | (111,474) | ​ | $ | (41,078) | ​ | $ | (152,552)
Unrealized gains (losses) on securities available-for-sale with other than temporary impairment | ​ |  | 2,315 | ​ |  | 18 | ​ |  | 2,333
Total unrealized gain (loss) on securities available-for-sale | ​ | $ | (109,159) | ​ | $ | (41,060) | ​ | $ | (150,219)
Unrealized loss on retirement plans | ​ |  | (17,471) | ​ |  | 315 | ​ |  | (17,156)
TOTAL | ​ | $ | (126,630) | ​ | $ | (40,745) | ​ | $ | (167,375)
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Balance at | ​ | Current Period | ​ | Balance at
(Dollar amounts in thousands) |  | 1/1/2022 |  | Change |  | 9/30/2022
Unrealized gains (losses) on securities available-for-sale without other than temporary impairment | ​ | $ | 13,155 | ​ | $ | (165,707) | ​ | $ | (152,552)
Unrealized gains (losses) on securities available-for-sale with other than temporary impairment | ​ |  | 2,519 | ​ |  | (186) | ​ |  | 2,333
Total unrealized income (loss) on securities available-for-sale | ​ | $ | 15,674 | ​ | $ | (165,893) | ​ | $ | (150,219)
Unrealized gain (loss) on retirement plans | ​ |  | (18,100) | ​ |  | 944 | ​ |  | (17,156)
TOTAL | ​ | $ | (2,426) | ​ | $ | (164,949) | ​ | $ | (167,375)
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 |  | 9/30/2022
Unrealized gains (losses) on securities available-for-sale without other than temporary impairment | ​ | $ | 13,155 | ​ | $ | (165,707) | ​ | $ | (152,552)
Unrealized gains (losses) on securities available-for-sale with other than temporary impairment | ​ |  | 2,519 | ​ |  | (186) | ​ |  | 2,333
Total unrealized income (loss) on securities available-for-sale | ​ | $ | 15,674 | ​ | $ | (165,893) | ​ | $ | (150,219)
Unrealized gain (loss) on retirement plans | ​ |  | (18,100) | ​ |  | 944 | ​ |  | (17,156)
TOTAL | ​ | $ | (2,426) | ​ | $ | (164,949) | ​ | $ | (167,375)

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