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Other Comprehensive Income (Loss) (Tables) | 9 Months Ended
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Sep. 30, 2023
Equity [Abstract] |
Schedule of Changes in the Components of Other Comprehensive Income (Loss) | Changes in the components of other comprehensive income (loss), net of tax, were as follows for the periods presented:
| Pre-Tax |  | Tax Expense (Benefit) |  | Net of Tax
Three months ended September 30, 2023 |  |  |  |  |
Securities available for sale: |  |  |  |  |
Unrealized holding losses on securities | $ | (17,175) |  |  | $ | (4,292) |  |  | $ | (12,883) |
Amortization of unrealized holding losses on securities transferred to the held to maturity category | 3,959 |  |  | 1,012 |  |  | 2,947 |
Total securities available for sale | (13,216) |  |  | (3,280) |  |  | (9,936) |
Derivative instruments: |  |  |  |  |
Unrealized holding gains on derivative instruments | 2,670 |  |  | 683 |  |  | 1,987 |
Total derivative instruments | 2,670 |  |  | 683 |  |  | 1,987 |
Defined benefit pension and post-retirement benefit plans: |  |  |  |  |
Amortization of net actuarial loss recognized in net periodic pension cost | 116 |  |  | 30 |  |  | 86 |
Total defined benefit pension and post-retirement benefit plans | 116 |  |  | 30 |  |  | 86 |
Total other comprehensive loss | $ | (10,430) |  |  | $ | (2,567) |  |  | $ | (7,863) |
Three months ended September 30, 2022 |  |  |  |  |
Securities available for sale: |  |  |  |  |
Unrealized holding losses on securities | $ | (85,283) |  |  | $ | (21,704) |  |  | $ | (63,579) |
Amortization of unrealized holding gains on securities transferred to the held to maturity category | 1,619 |  |  | 412 |  |  | 1,207 |
Total securities available for sale | (83,664) |  |  | (21,292) |  |  | (62,372) |
Derivative instruments: |  |  |  |  |
Unrealized holding gains on derivative instruments | 2,262 |  |  | 575 |  |  | 1,687 |
Total derivative instruments | 2,262 |  |  | 575 |  |  | 1,687 |
Defined benefit pension and post-retirement benefit plans: |  |  |  |  |
Amortization of net actuarial loss recognized in net periodic pension cost | 42 |  |  | 11 |  |  | 31 |
Total defined benefit pension and post-retirement benefit plans | 42 |  |  | 11 |  |  | 31 |
Total other comprehensive loss | $ | (81,360) |  |  | $ | (20,706) |  |  | $ | (60,654) |
| Pre-Tax |  | Tax Expense (Benefit) |  | Net of Tax
Nine months ended September 30, 2023 |  |  |  |  |
Securities available for sale: |  |  |  |  |
Unrealized holding losses on securities | $ | (17,744) |  |  | $ | (4,462) |  |  | $ | (13,282) |
Reclassification adjustment for losses realized in net income | 22,438 |  |  | 5,622 |  |  | 16,816 |
Amortization of unrealized holding losses on securities transferred to the held to maturity category | 10,113 |  |  | 2,586 |  |  | 7,527 |
Total securities available for sale | 14,807 |  |  | 3,746 |  |  | 11,061 |
Derivative instruments: |  |  |  |  |
Unrealized holding losses on derivative instruments | (2,153) |  |  | (547) |  |  | (1,606) |
Total derivative instruments | (2,153) |  |  | (547) |  |  | (1,606) |
Defined benefit pension and post-retirement benefit plans: |  |  |  |  |
Amortization of net actuarial loss recognized in net periodic pension cost | 347 |  |  | 89 |  |  | 258 |
Total defined benefit pension and post-retirement benefit plans | 347 |  |  | 89 |  |  | 258 |
Total other comprehensive income | $ | 13,001 |  |  | $ | 3,288 |  |  | $ | 9,713 |
Nine months ended September 30, 2022 |  |  |  |  |
Securities available for sale: |  |  |  |  |
Unrealized holding losses on securities | $ | (296,444) |  |  | $ | (75,445) |  |  | $ | (220,999) |
Amortization of unrealized holding losses on securities transferred to the held to maturity category | 1,300 |  |  | 331 |  |  | 969 |
Total securities available for sale | (295,144) |  |  | (75,114) |  |  | (220,030) |
Derivative instruments: |  |  |  |  |
Unrealized holding gains on derivative instruments | 19,219 |  |  | 4,891 |  |  | 14,328 |
Total derivative instruments | 19,219 |  |  | 4,891 |  |  | 14,328 |
Defined benefit pension and post-retirement benefit plans: |  |  |  |  |
Amortization of net actuarial loss recognized in net periodic pension cost | 125 |  |  | 32 |  |  | 93 |
Total defined benefit pension and post-retirement benefit plans | 125 |  |  | 32 |  |  | 93 |
Total other comprehensive loss | $ | (275,800) |  |  | $ | (70,191) |  |  | $ | (205,609) |
Schedule of Accumulated Balances for Each Component of Other Comprehensive Income (Loss), 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, 2023 |  | December 31, 2022
Unrealized losses on securities | $ | (208,705) |  |  | $ | (219,766) |
Unrealized gains on derivative instruments | 17,350 |  |  | 18,956 |
Unrecognized losses on defined benefit pension and post-retirement benefit plans obligations | (7,969) |  |  | (8,227) |
Total accumulated other comprehensive loss | $ | (199,324) |  |  | $ | (209,037) |

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