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Accumulated Other Comprehensive Income (Tables) | 3 Months Ended
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Mar. 31, 2026
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] |
Components of Accumulated Other Comprehensive Income (Loss) | The table below shows the activity and accumulated balances for components of other comprehensive income. Information about unrealized gains and losses on securities can be found in Note 4, and information about unrealized gains and losses on cash flow hedge derivatives is located in Note 12.
|  |  | Unrealized Gains (Losses) on Securities (1) | Pension Loss | Unrealized Gains (Losses) on Cash Flow Hedge Derivatives (2) | Total Accumulated Other Comprehensive Income (Loss)
(In thousands) |  |
Balance January 1, 2026 |  |  | $ | (485,071) |  | $ | (9,623) |  | $ | (12,996) |  | $ | (507,690) |
Other comprehensive income (loss) before reclassifications to current earnings |  |  | (40,733) |  | — |  | (1,666) |  | (42,399) |
Amounts reclassified to current earnings from accumulated other comprehensive income |  |  | — |  | 138 |  | (274) |  | (136) |
Current period other comprehensive income (loss), before tax |  |  | (40,733) |  | 138 |  | (1,940) |  | (42,535) |
Income tax (expense) benefit |  |  | 10,183 |  | (35) |  | 485 |  | 10,633 |
Current period other comprehensive income (loss), net of tax |  |  | (30,550) |  | 103 |  | (1,455) |  | (31,902) |
Balance March 31, 2026 |  |  | $ | (515,621) |  | $ | (9,520) |  | $ | (14,451) |  | $ | (539,592) |
Balance January 1, 2025 |  |  | $ | (742,926) |  | $ | (12,059) |  | $ | (3,926) |  | $ | (758,911) |
Other comprehensive income (loss) before reclassifications to current earnings |  |  | 157,722 |  | — |  | 10,366 |  | 168,088 |
Amounts reclassified to current earnings from accumulated other comprehensive income |  |  | (4) |  | 229 |  | (2,533) |  | (2,308) |
Current period other comprehensive income (loss), before tax |  |  | 157,718 |  | 229 |  | 7,833 |  | 165,780 |
Income tax (expense) benefit |  |  | (39,430) |  | (57) |  | (1,958) |  | (41,445) |
Current period other comprehensive income (loss), net of tax |  |  | 118,288 |  | 172 |  | 5,875 |  | 124,335 |
Balance March 31, 2025 |  |  | $ | (624,638) |  | $ | (11,887) |  | $ | 1,949 |  | $ | (634,576) |
(1) The pre-tax amounts reclassified from accumulated other comprehensive income to current earnings are included in "investment securities gains (losses), net" in the consolidated statements of income. (2) The pre-tax amounts reclassified from accumulated other comprehensive income to current earnings are included in "interest and fees on loans" in the consolidated statements of income.

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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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