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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) | 6 Months Ended
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Jun. 30, 2025
Equity [Abstract] |
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) | ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) Accumulated other comprehensive income (loss) represents the net unrealized holding gains or losses on securities available for sale and the funded status of the Corporation's defined benefit pension plan and other benefit plans, as of the Consolidated Balance Sheet dates, net of the related tax effect. The following is a summary of the changes in accumulated other comprehensive income (loss) by component, net of tax, for the periods indicated (in thousands):
|  | Unrealized Gains and Losses on Securities Available for Sale |  | Defined Benefit and Other Benefit Plans |  | Total
Balance at April 1, 2025 |  | $ | (55,199) |  |  | $ | (1,720) |  |  | $ | (56,919) |
Other comprehensive income (loss) before reclassification |  | 971 |  |  | — |  |  | 971 |
Amounts reclassified from accumulated other comprehensive income (loss) |  | 13,237 |  |  | 6 |  |  | 13,243 |
Net current period other comprehensive income (loss) |  | 14,208 |  |  | 6 |  |  | 14,214 |
Balance at June 30, 2025 |  | $ | (40,991) |  |  | $ | (1,714) |  |  | $ | (42,705) |
|  | Unrealized Gains and Losses on Securities Available for Sale |  | Defined Benefit and Other Benefit Plans |  | Total
Balance at April 1, 2024 |  | $ | (66,870) |  |  | $ | (3,208) |  |  | $ | (70,078) |
Other comprehensive income before reclassification |  | 162 |  |  | — |  |  | 162 |
Amounts reclassified from accumulated other comprehensive income |  | — |  |  | 5 |  |  | 5 |
Net current period other comprehensive income (loss) |  | 162 |  |  | 5 |  |  | 167 |
Balance at June 30, 2024 |  | $ | (66,708) |  |  | $ | (3,203) |  |  | $ | (69,911) |
|  | Unrealized Gains and Losses on Securities Available for Sale |  | Defined Benefit and Other Benefit Plans |  | Total
Balance at January 1, 2025 |  | $ | (63,339) |  |  | $ | (1,726) |  |  | $ | (65,065) |
Other comprehensive income before reclassification |  | 9,111 |  |  | — |  |  | 9,111 |
Amounts reclassified from accumulated other comprehensive income (loss) |  | 13,237 |  |  | 12 |  |  | 13,249 |
Net current period other comprehensive income |  | 22,348 |  |  | 12 |  |  | 22,360 |
Balance at June 30, 2025 |  | $ | (40,991) |  |  | $ | (1,714) |  |  | $ | (42,705) |
|  | Unrealized Gains and Losses on Securities Available for Sale |  | Defined Benefit and Other Benefit Plans |  | Total
Balance at January 1, 2024 |  | $ | (62,800) |  |  | $ | (3,213) |  |  | $ | (66,013) |
Other comprehensive income before reclassification |  | (3,908) |  |  | — |  |  | (3,908) |
Amounts reclassified from accumulated other comprehensive income (loss) |  | — |  |  | 10 |  |  | 10 |
Net current period other comprehensive income (loss) |  | (3,908) |  |  | 10 |  |  | (3,898) |
Balance at June 30, 2024 |  | $ | (66,708) |  |  | $ | (3,203) |  |  | $ | (69,911) |
The following is the reclassification out of accumulated other comprehensive income for the periods indicated (in thousands):
Details about Accumulated Other Comprehensive Income (Loss) Components |  | Three Months Ended June 30, |  | Affected Line Item in the Statement Where Net Income (Loss) is Presented
| 2025 |  | 2024 |
Unrealized gains and losses on securities available for sale: |  |  |  |  |  |
Net realized losses on securities available for sale |  | $ | 17,498 |  |  | $ | — |  |  | Net (losses) on securities transactions
Tax effect |  | (4,261) |  |  | — |  |  | Income tax expense (benefit)
Net of tax |  | 13,237 |  |  | — |  |  |
Amortization of defined pension plan and other benefit plan items: |  |  |  |
Actuarial losses (a) |  | 8 |  |  | 7 |  |  | Other components of net periodic pension and postretirement benefits
Tax effect |  | (2) |  |  | (2) |  |  | Income tax expense (benefit)
Net of tax |  | 6 |  |  | 5 |  |  |
Total reclassification for the period, net of tax |  | $ | 13,243 |  |  | $ | 5 |  |  |
(a) These accumulated other comprehensive income components are included in the computation of net periodic pension and other benefit plan costs (see Note 12 for additional information).
Details about Accumulated Other Comprehensive Income (Loss) Components |  | Six Months Ended June 30, |  | Affected Line Item in the Statement Where Net Income (Loss) is Presented
| 2025 |  | 2024 |
Unrealized gains and losses on securities available for sale: |  |  |  |
Net realized losses on securities available for sale |  | $ | 17,498 |  |  | $ | — |  |  | Net (losses) on securities transactions
Tax effect |  | (4,261) |  |  | — |  |  | Income tax expense (benefit)
Net of tax |  | 13,237 |  |  | — |  |  |
Amortization of defined pension plan and other benefit plan items: |  |
Actuarial losses (a) |  | 16 |  |  | 14 |  |  | Other components of net periodic pension and postretirement benefits
Tax effect |  | (4) |  |  | (4) |  |  | Income tax expense (benefit)
Net of tax |  | 12 |  |  | 10 |  |  |
Total reclassification for the period, net of tax |  | $ | 13,249 |  |  | $ | 10 |  |  |
(a) These accumulated other comprehensive income components are included in the computation of net periodic pension and other benefit plan costs (see Note 12 for additional information).

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- Definition The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(19)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477250/944-220-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(21)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(23)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/220/tableOfContent + Details
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