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Other Comprehensive Income (Tables) | 9 Months Ended
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Sep. 30, 2025
Equity [Abstract] |
Schedule of Changes in the Components of Other Comprehensive Income | Changes in the components of other comprehensive income, net of tax, were as follows for the periods presented:
| Pre-Tax |  | Tax Expense (Benefit) |  | Net of Tax
Three months ended September 30, 2025 |  |  |  |  |
Securities available for sale: |  |  |  |  |
Unrealized holding gains on securities | $ | 15,440 |  |  | $ | 3,855 |  |  | $ | 11,585 |
Amortization of unrealized holding losses on securities transferred to the held to maturity category | 3,005 |  |  | 768 |  |  | 2,237 |
Total securities available for sale | 18,445 |  |  | 4,623 |  |  | 13,822 |
Derivative instruments: |  |  |  |  |
Unrealized holding losses on derivative instruments | (1,376) |  |  | (350) |  |  | (1,026) |
Total derivative instruments | (1,376) |  |  | (350) |  |  | (1,026) |
Defined benefit pension and post-retirement benefit plans: |  |  |  |  |
Amortization of net actuarial loss recognized in net periodic pension cost | 99 |  |  | 24 |  |  | 75 |
Total defined benefit pension and post-retirement benefit plans | 99 |  |  | 24 |  |  | 75 |
Total other comprehensive income | $ | 17,168 |  |  | $ | 4,297 |  |  | $ | 12,871 |
Three months ended September 30, 2024 |  |  |  |  |
Securities available for sale: |  |  |  |  |
Unrealized holding gains on securities | $ | 31,313 |  |  | $ | 7,872 |  |  | $ | 23,441 |
Amortization of unrealized holding losses on securities transferred to the held to maturity category | 3,131 |  |  | 800 |  |  | 2,331 |
Total securities available for sale | 34,444 |  |  | 8,672 |  |  | 25,772 |
Derivative instruments: |  |  |  |  |
Unrealized holding losses on derivative instruments | (1,116) |  |  | (288) |  |  | (828) |
Total derivative instruments | (1,116) |  |  | (288) |  |  | (828) |
Defined benefit pension and post-retirement benefit plans: |  |  |  |  |
Amortization of net actuarial loss recognized in net periodic pension cost | 106 |  |  | 28 |  |  | 78 |
Total defined benefit pension and post-retirement benefit plans | 106 |  |  | 28 |  |  | 78 |
Total other comprehensive income | $ | 33,434 |  |  | $ | 8,412 |  |  | $ | 25,022 |
| Pre-Tax |  | Tax Expense (Benefit) |  | Net of Tax
Nine months ended September 30, 2025 |  |  |  |  |
Securities available for sale: |  |  |  |  |
Unrealized holding gains on securities | $ | 51,167 |  |  | $ | 12,854 |  |  | $ | 38,313 |
Amortization of unrealized holding losses on securities transferred to the held to maturity category | 8,889 |  |  | 2,274 |  |  | 6,615 |
Total securities available for sale | 60,056 |  |  | 15,128 |  |  | 44,928 |
Derivative instruments: |  |  |  |  |
Unrealized holding losses on derivative instruments | (4,988) |  |  | (1,275) |  |  | (3,713) |
Total derivative instruments | (4,988) |  |  | (1,275) |  |  | (3,713) |
Defined benefit pension and post-retirement benefit plans: |  |  |  |  |
Amortization of net actuarial loss recognized in net periodic pension cost | 298 |  |  | 75 |  |  | 223 |
Total defined benefit pension and post-retirement benefit plans | 298 |  |  | 75 |  |  | 223 |
Total other comprehensive income | $ | 55,366 |  |  | $ | 13,928 |  |  | $ | 41,438 |
Nine months ended September 30, 2024 |  |  |  |  |
Securities available for sale: |  |  |  |  |
Unrealized holding losses on securities | $ | 25,769 |  |  | $ | 6,494 |  |  | $ | 19,275 |
Amortization of unrealized holding losses on securities transferred to the held to maturity category | 9,658 |  |  | 2,468 |  |  | 7,190 |
Total securities available for sale | 35,427 |  |  | 8,962 |  |  | 26,465 |
Derivative instruments: |  |  |  |  |
Unrealized holding losses on derivative instruments | (2,069) |  |  | (530) |  |  | (1,539) |
Total derivative instruments | (2,069) |  |  | (530) |  |  | (1,539) |
Defined benefit pension and post-retirement benefit plans: |  |  |  |  |
Amortization of net actuarial loss recognized in net periodic pension cost | 317 |  |  | 81 |  |  | 236 |
Total defined benefit pension and post-retirement benefit plans | 317 |  |  | 81 |  |  | 236 |
Total other comprehensive income | $ | 33,675 |  |  | $ | 8,513 |  |  | $ | 25,162 |
Schedule of Accumulated Balances for Each Component of Other Comprehensive Income, Net of Tax | The accumulated balances for each component of other comprehensive loss, net of tax, were as follows as of the dates presented:
| September 30, 2025 |  | December 31, 2024
Unrealized losses on securities | $ | (108,006) |  |  | $ | (152,934) |
Unrealized gains on derivative instruments | 13,716 |  |  | 17,429 |
Unrecognized losses on defined benefit pension and post-retirement benefit plans obligations | (6,880) |  |  | (7,103) |
Total accumulated other comprehensive loss | $ | (101,170) |  |  | $ | (142,608) |

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