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Accumulated Other Comprehensive Income (Loss) | 9 Months Ended
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Sep. 30, 2025
Accumulated Other Comprehensive Income (Loss) |
Accumulated Other Comprehensive Income (Loss) | ​ ​ Note 15 — Accumulated Other Comprehensive Income (Loss) ​ The changes in each component of accumulated other comprehensive loss, net of tax, were as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Unrealized Losses | ​ | ​ | ​ |
​ | ​ | Benefit | ​ | on Securities | ​ | ​ | ​ |
(Dollars in thousands) | ​ | Plans | ​ | Available for Sale | ​ | Total |
Three Months Ended September 30, 2025 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance at June 30, 2025 | ​ | $ | 578 | ​ | $ | (372,687) | ​ | $ | (372,109) | ​
Other comprehensive income before reclassifications | ​ |  | — | ​ |  | 56,097 | ​ |  | 56,097 | ​
Net comprehensive income | ​ |  | — | ​ |  | 56,097 | ​ |  | 56,097 | ​
Balance at September 30, 2025 | ​ | $ | 578 | ​ | $ | (316,590) | ​ | $ | (316,012) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Three Months Ended September 30, 2024 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance at June 30, 2024 | ​ | $ | 627 | ​ | $ | (620,838) | ​ | $ | (620,211) | ​
Other comprehensive income before reclassifications | ​ |  | — | ​ |  | 140,571 | ​ | ​ | 140,571 | ​
Net comprehensive income | ​ |  | — | ​ |  | 140,571 | ​ |  | 140,571 | ​
Balance at September 30, 2024 | ​ | $ | 627 | ​ | $ | (480,267) | ​ | $ | (479,640) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Nine Months Ended September 30, 2025 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance at December 31, 2024 | ​ | $ | 578 | ​ | $ | (607,499) | ​ | $ | (606,921) | ​
Other comprehensive income before reclassifications | ​ | ​ | — | ​ | ​ | 117,241 | ​ | ​ | 117,241 | ​
Amounts reclassified from accumulated other comprehensive loss | ​ |  | — | ​ |  | 173,668 | ​ |  | 173,668 | ​
Net comprehensive income | ​ |  | — | ​ |  | 290,909 | ​ |  | 290,909 | ​
Balance at September 30, 2025 | ​ | $ | 578 | ​ | $ | (316,590) | ​ | $ | (316,012) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Nine Months Ended September 30, 2024 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance at December 31, 2023 | ​ | $ | 627 | ​ | $ | (583,163) | ​ | $ | (582,536) | ​
Other comprehensive income before reclassifications | ​ |  | — | ​ |  | 102,896 | ​ |  | 102,896 | ​
Net comprehensive income | ​ |  | — | ​ |  | 102,896 | ​ |  | 102,896 | ​
Balance at September 30, 2024 | ​ | $ | 627 | ​ | $ | (480,267) | ​ | $ | (479,640) | ​
​ The table below presents the reclassifications out of accumulated other comprehensive loss, net of tax: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Amount Reclassified from Accumulated Other Comprehensive Income (Loss) | ​ | ​ |
(Dollars in thousands) | ​ | For the Three Months Ended September 30, | ​ | For the Nine Months Ended September 30, | ​ | ​ |
Accumulated Other Comprehensive Loss Component |  | 2025 |  | 2024 |  | 2025 |  | 2024 |  | Income Statement Line Item Affected |
Loss on sale of available for sale securities: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | $ | — | ​ | $ | — | ​ | $ | 228,811 | ​ | $ | — | ​ | Securities losses, net | ​
​ | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (55,143) | ​ | ​ | — | ​ | Provision for income taxes | ​
​ | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 173,668 | ​ | ​ | — | ​ | Net income | ​
Total reclassifications for the period | ​ | $ | — | ​ | $ | — | ​ | $ | 173,668 | ​ | $ | — | ​ | ​ | ​
​

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- Definition The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(19)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477250/944-220-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(21)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(23)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/220/tableOfContent + Details
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