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COMPONENTS OF QUARTERLY AND YEAR TO DATE NET PERIODIC BENEFIT COSTS (Tables) | 6 Months Ended
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Jun. 30, 2025
Retirement Benefits [Abstract] |
Schedule of Components of Net Periodic Benefit Costs | The components of net periodic expense for the Corporation’s pension and other benefit plans for the periods indicated are as follows (in thousands):
|  | Three Months Ended June 30, |  | Six Months Ended June 30,
|  | 2025 |  | 2024 |  | 2025 |  | 2024
Qualified Pension Plan |  |  |  |  |  |  |  |
Service cost, benefits earned during the period |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Interest cost on projected benefit obligation |  | 391 |  |  | 378 |  |  | 782 |  |  | 756 |
Expected return on plan assets |  | (524) |  |  | (629) |  |  | (1,048) |  |  | (1,258) |
Amortization of unrecognized transition obligation |  | — |  |  | — |  |  | — |  |  | — |
Amortization of unrecognized prior service cost |  | — |  |  | — |  |  | — |  |  | — |
Amortization of unrecognized net loss |  | — |  |  | — |  |  | — |  |  | — |
Net periodic pension benefit |  | $ | (133) |  |  | $ | (251) |  |  | $ | (266) |  |  | $ | (502) |
Supplemental Pension Plan |  |  |  |  |  |  |  |
Service cost, benefits earned during the period |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Interest cost on projected benefit obligation |  | 11 |  |  | 11 |  |  | 22 |  |  | 22 |
Expected return on plan assets |  | — |  |  | — |  |  | — |  |  | — |
Amortization of unrecognized prior service cost |  | — |  |  | — |  |  | — |  |  | — |
Amortization of unrecognized net loss |  | 3 |  |  | 3 |  |  | 6 |  |  | 6 |
Net periodic supplemental pension cost |  | $ | 14 |  |  | $ | 14 |  |  | $ | 28 |  |  | $ | 28 |
Postretirement Plan, Medical and Life |  |  |  |  |  |  |  |
Service cost, benefits earned during the period |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Interest cost on projected benefit obligation |  | 1 |  |  | 1 |  |  | 2 |  |  | 2 |
Expected return on plan assets |  | — |  |  | — |  |  | — |  |  | — |
Amortization of unrecognized prior service cost |  | — |  |  | — |  |  | — |  |  | — |
Amortization of unrecognized net loss |  | 5 |  |  | 4 |  |  | 10 |  |  | 8 |
Net periodic postretirement, medical and life cost |  | $ | 6 |  |  | $ | 5 |  |  | $ | 12 |  |  | $ | 10 |

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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (q) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-5 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 715 -SubTopic 20 -Subparagraph (h) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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