| Schedule of components of accumulated other comprehensive income (losses), net of tax |
| | | | | | | | | | | | | | | | Unrealized Losses | | | | | | | Benefit | | on Securities | | | | | (Dollars in thousands) | | Plans | | Available for Sale | | Total | | Three Months Ended June 30, 2026 | | | | | | | | | | | Balance at March 31, 2026 | | $ | 565 | | $ | (326,674) | | $ | (326,109) | | Other comprehensive income before reclassifications | | | — | | | 15,974 | | | 15,974 | | Net comprehensive income | | | — | | | 15,974 | | | 15,974 | | Balance at June 30, 2026 | | $ | 565 | | $ | (310,700) | | $ | (310,135) | | | | | | | | | | | | | Three Months Ended June 30, 2025 | | | | | | | | | | | Balance at March 31, 2025 | | $ | 578 | | $ | (377,245) | | $ | (376,667) | | Other comprehensive income before reclassifications | | | — | | | 4,558 | | | 4,558 | | Net comprehensive income | | | — | | | 4,558 | | | 4,558 | | Balance at June 30, 2025 | | $ | 578 | | $ | (372,687) | | $ | (372,109) | | | | | | | | | | | | | Six Months Ended June 30, 2026 | | | | | | | | | | | Balance at December 31, 2025 | | $ | 565 | | $ | (283,946) | | $ | (283,381) | | Other comprehensive loss before reclassifications | | | — | | | (26,754) | | | (26,754) | | Net comprehensive loss | | | — | | | (26,754) | | | (26,754) | | Balance at June 30, 2026 | | $ | 565 | | $ | (310,700) | | $ | (310,135) | | | | | | | | | | | | | Six Months Ended June 30, 2025 | | | | | | | | | | | Balance at December 31, 2024 | | $ | 578 | | $ | (607,499) | | $ | (606,921) | | Other comprehensive income before reclassifications | | | — | | | 61,144 | | | 61,144 | | Amounts reclassified from accumulated other comprehensive loss | | | — | | | 173,668 | | | 173,668 | | Net comprehensive income | | | — | | | 234,812 | | | 234,812 | | Balance at June 30, 2025 | | $ | 578 | | $ | (372,687) | | $ | (372,109) | |
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| Schedule of reclassifications out of accumulated other comprehensive income (losses), net of tax |
| | | | | | | | | | | | | | | | | | Amount Reclassified from Other Comprehensive Income (Loss) | | Amount Reclassified from Other Comprehensive Income (Loss) | | | | (Dollars in thousands) | | For the Three Months Ended June 30, | | For the Six Months Ended June 30, | | | | Accumulated Other Comprehensive Loss Component | | 2026 | | 2025 | | 2026 | | 2025 | | 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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