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Accumulated Other Comprehensive (Loss), Net of Tax (Tables) | 12 Months Ended
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Dec. 31, 2025
Equity [Abstract] |
Schedule of Other Comprehensive Income (Loss) | The following table summarizes the changes in each component of accumulated other comprehensive (loss), net of the related tax impact:
(In thousands) | Investment Securities Available- for-Sale | Derivative Financial Instruments | Defined Benefit Pension and Other Postretirement Benefit Plans | Total
Balance at December 31, 2022 | $ | (631,160) |  | $ | (8,874) |  | $ | (44,926) |  | $ | (684,960) |
Other comprehensive income (loss) before reclassifications | 90,654 |  | (4,883) |  | 11,794 |  | 97,565 |
Amounts reclassified from accumulated other comprehensive (loss) | 23,056 |  | 10,888 |  | 2,880 |  | 36,824 |
Other comprehensive income, net of tax | 113,710 |  | 6,005 |  | 14,674 |  | 134,389 |
Balance at December 31, 2023 | (517,450) |  | (2,869) |  | (30,252) |  | (550,571) |
Other comprehensive (loss) income before reclassifications | (106,447) |  | (37,446) |  | 2,397 |  | (141,496) |
Amounts reclassified from accumulated other comprehensive (loss) | 103,579 |  | 30,715 |  | 1,390 |  | 135,684 |
Other comprehensive (loss) income, net of tax | (2,868) |  | (6,731) |  | 3,787 |  | (5,812) |
Balance at December 31, 2024 | (520,318) |  | (9,600) |  | (26,465) |  | (556,383) |
Other comprehensive income before reclassifications | 186,590 |  | 5,902 |  | 4,885 |  | 197,377 |
Amounts reclassified from accumulated other comprehensive (loss) | (385) |  | 7,439 |  | 1,108 |  | 8,162 |
Other comprehensive income, net of tax | 186,205 |  | 13,341 |  | 5,993 |  | 205,539 |
Balance at December 31, 2025 | $ | (334,113) |  | $ | 3,741 |  | $ | (20,472) |  | $ | (350,844) |
Schedule of Accumulated Other Comprehensive Income (Loss) | The following table further summarizes the amounts reclassified from accumulated other comprehensive (loss):
| Years ended December 31, |
Accumulated Other Comprehensive (Loss) Components | 2025 |  | 2024 |  | 2023 | Associated Line Item on the Consolidated Statements Of Income
(In thousands) |  |  |  |  |  |
Investment securities available-for-sale: |  |  |  |  |  |
Net gains (losses) (1) | $ | 528 |  |  | $ | (141,418) |  |  | $ | (31,533) |  | Non-interest income (2)
Tax (expense) benefit | (143) |  |  | 37,839 |  |  | 8,477 |  | Income tax expense
Net of tax | $ | 385 |  |  | $ | (103,579) |  |  | $ | (23,056) |  |
Derivative financial instruments: |  |  |  |  |  |
Interest payments (3) | $ | (10,207) |  |  | $ | (41,472) |  |  | $ | (12,279) |  | Interest and fees on loans and leases
Hedge terminations | $ | — |  |  | $ | (34) |  |  | $ | (310) |  | Long-term debt interest expense
Time-value premiums | — |  |  | (533) |  |  | (2,349) |  | Interest and fees on loans and leases
Tax benefit | 2,768 |  |  | 11,324 |  |  | 4,050 |  | Income tax expense
Net of tax | $ | (7,439) |  |  | $ | (30,715) |  |  | $ | (10,888) |  |
Defined benefit pension and other postretirement benefit plans: |  |  |  |  |  |
Transition obligation | $ | 2 |  |  | $ | — |  |  | $ | — |  | Other expense
Net actuarial (losses) | (1,522) |  |  | (1,907) |  |  | (2,083) |  | Other expense
Other | — |  |  | — |  |  | (1,869) |  | Other expense
Tax benefit | 412 |  |  | 517 |  |  | 1,072 |  | Income tax expense
Net of tax | $ | (1,108) |  |  | $ | (1,390) |  |  | $ | (2,880) |  |
(1)Reclassification adjustments for net unrealized gains (losses) on investment securities available-for-sale that were sold are determined by reference to the unrealized gain or loss reported in the month prior to sale. (2)Gains and losses realized on sales of investment securities available-for-sale are generally included as a component of non-interest income on the accompanying Consolidated Statements of Income unless any portion or all of the loss is due to credit related factors, in which the amount is then included in the Provision for credit losses. Additional information regarding the presentation of gains and losses realized on sales of investment securities available-for-sale for the years ended December 31, 2025, 2024, and 2023, respectively, can be found within Note 3: Investment Securities. (3)Over the next 12 months, an estimated $(4.1) million related to cash flow hedge gain or loss will be reclassified from AOCL, increasing Interest and fees on loans and leases as hedge interest payments are made. The following tables summarize each component of other comprehensive income (loss) and the related tax effects:
| Year ended December 31, 2025
(In thousands) | Amount Before Tax | Tax Benefit (Expense) | Amount Net of Tax
Investment securities available-for-sale: |  |  |
Net unrealized gain arising during the year | $ | 255,998 |  | $ | (69,408) |  | $ | 186,590 |
Reclassification adjustment for net realized (gains) included in net income | (528) |  | 143 |  | (385) |
Total investment securities available-for-sale | 255,470 |  | (69,265) |  | 186,205 |
Derivative financial instruments: |  |  |
Net unrealized gain arising during the year | 8,099 |  | (2,197) |  | 5,902 |
Reclassification adjustment for net realized losses included in net income | 10,207 |  | (2,768) |  | 7,439 |
Total derivative financial instruments | 18,306 |  | (4,965) |  | 13,341 |
Defined benefit pension and other postretirement benefit plans: |  |  |
Net actuarial gain arising during the year | 6,703 |  | (1,818) |  | 4,885 |
Reclassification adjustment for amortization of transition obligation and amortization of net actuarial loss included in net income | 1,520 |  | (412) |  | 1,108 |
Total defined benefit pension and other postretirement benefit plans | 8,223 |  | (2,230) |  | 5,993 |
Other comprehensive income, net of tax | $ | 281,999 |  | $ | (76,460) |  | $ | 205,539 |
| Year ended December 31, 2024
(In thousands) | Amount Before Tax | Tax Benefit (Expense) | Amount Net of Tax
Investment securities available-for-sale: |  |  |
Net unrealized (losses) arising during the year | $ | (145,673) |  | $ | 39,226 |  | $ | (106,447) |
Reclassification adjustment for net realized losses included in net income | 141,418 |  | (37,839) |  | 103,579 |
Total investment securities available-for-sale | (4,255) |  | 1,387 |  | (2,868) |
Derivative financial instruments: |  |  |
Net unrealized (losses) arising during the year | (51,383) |  | 13,937 |  | (37,446) |
Reclassification adjustment for net realized losses included in net income | 42,039 |  | (11,324) |  | 30,715 |
Total derivative financial instruments | (9,344) |  | 2,613 |  | (6,731) |
Defined benefit pension and other postretirement benefit plans: |  |  |
Net actuarial gain arising during the year | 3,290 |  | (893) |  | 2,397 |
Reclassification adjustment for actuarial net loss amortization included in net income | 1,907 |  | (517) |  | 1,390 |
Total defined benefit pension and other postretirement benefit plans | 5,197 |  | (1,410) |  | 3,787 |
Other comprehensive (loss), net of tax | $ | (8,402) |  | $ | 2,590 |  | $ | (5,812) |
| Year ended December 31, 2023
(In thousands) | Amount Before Tax | Tax Benefit (Expense) | Amount Net of Tax
Investment securities available-for-sale: |  |  |
Net unrealized gains arising during the year | $ | 124,233 |  | $ | (33,579) |  | $ | 90,654 |
Reclassification adjustment for net realized losses included in net income | 31,533 |  | (8,477) |  | 23,056 |
Total investment securities available-for-sale | 155,766 |  | (42,056) |  | 113,710 |
Derivative financial instruments: |  |  |
Net unrealized (losses) arising during the year | (6,701) |  | 1,818 |  | (4,883) |
Reclassification adjustment for net realized losses included in net income | 14,938 |  | (4,050) |  | 10,888 |
Total derivative financial instruments | 8,237 |  | (2,232) |  | 6,005 |
Defined benefit pension and other postretirement benefit plans: |  |  |
Net actuarial gain arising during the year | 16,183 |  | (4,389) |  | 11,794 |
Reclassification adjustment for actuarial net loss amortization and other included in net income | 3,952 |  | (1,072) |  | 2,880 |
Total defined benefit pension and other postretirement benefit plans | 20,135 |  | (5,461) |  | 14,674 |
Other comprehensive income, net of tax | $ | 184,138 |  | $ | (49,749) |  | $ | 134,389 |

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- Definition Tabular disclosure of components of comprehensive income (loss). Includes, but is not limited to, foreign currency translation adjustments, foreign currency transactions designated as economic hedges of a net investment in foreign entity, gain (loss) and prior service cost (credit) for pension plans and other postretirement benefit plans. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Paragraph 1 -Section 45 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-1 + Details
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