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Comprehensive Income/(Loss) (Tables) | 12 Months Ended
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Dec. 31, 2025
Equity [Abstract] |
Schedule of Changes in Accumulated Other Comprehensive Income (Loss) by Component, Net of Tax | Changes in accumulated other comprehensive income (loss) by component, net of tax, were as follows for the periods indicated:
| Year Ended December 31, 2025
| Investment Securities Available-for-Sale |  | Net Change in Fair Value of Cash Flow Hedges |  | Postretirement Benefits |  | Accumulated Other Comprehensive Income (Loss)
| (In Thousands)
Balance at December 31, 2024 | $ | (53,718) |  |  | $ | (1,323) |  |  | $ | 2,159 |  |  | $ | (52,882) |
Other comprehensive income (loss) | 33,125 |  |  | (20) |  |  | (1,620) |  |  | 31,485 |
(Income) expense recognized in earnings | — |  |  | 1,395 |  |  | — |  |  | 1,395 |
Balance at December 31, 2025 | $ | (20,593) |  |  | $ | 52 |  |  | $ | 539 |  |  | $ | (20,002) |
| Year Ended December 31, 2024
| Investment Securities Available-for-Sale |  | Net Change in Fair Value of Cash Flow Hedges |  | Postretirement Benefits |  | Accumulated Other Comprehensive Income (Loss)
| (In Thousands)
Balance at December 31, 2023 | $ | (52,546) |  |  | $ | (1,581) |  |  | $ | 1,329 |  |  | $ | (52,798) |
Other comprehensive income (loss) | (1,172) |  |  | (2,744) |  |  | 1,127 |  |  | (2,789) |
(Income) expense recognized in earnings | — |  |  | 3,002 |  |  | (297) |  |  | 2,705 |
Balance at December 31, 2024 | $ | (53,718) |  |  | $ | (1,323) |  |  | $ | 2,159 |  |  | $ | (52,882) |
| Year Ended December 31, 2023
| Investment Securities Available-for-Sale |  | Net Change in Fair Value of Cash Flow Hedges |  | Postretirement Benefits |  | Accumulated Other Comprehensive Income (Loss)
| (In Thousands)
Balance at December 31, 2022 | $ | (60,193) |  |  | $ | (2,242) |  |  | $ | 488 |  |  | $ | (61,947) |
Other comprehensive income (loss) | 7,647 |  |  | (2,026) |  |  | 1,135 |  |  | 6,756 |
(Income) expense recognized in earnings | — |  |  | 2,687 |  |  | (294) |  |  | 2,393 |
Balance at December 31, 2023 | $ | (52,546) |  |  | $ | (1,581) |  |  | $ | 1,329 |  |  | $ | (52,798) |

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-14A Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 830 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481674/830-30-50-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 830 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 20 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481694/830-30-45-20 + Details
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